I think knowing your core type is important when it comes to figuring out your instincts. One on one intimate relationships can be valued by any type and I don't think it is the best predictor of sx first. Sx first is not one on one. Sx first is a bit more primal than the other instincts. Sp in hardly primal these days unless you are living somewhere where you have to physically fight for daily survival. Anyone with internet is probably not facing those issues.
I think this may explain it better than I can.
I can always tell when I am in the presence of an sx first irl. Online I just take someone's word for it and imagine there is a lot they are not sharing about themselves if they type sx first and it isn't obvious in their posts. I see a lot of sp and so first in most posts.
Mistyping by tests is very common too since people tend to answer the questions based on their mood or state of mind in the moment. Sometimes it is wishful thinking and sometimes it is misunderstanding the questions. I think one's life is a better testament to their instincts than any test. When answering the questions you have to look at your life as whole and not just based on what you're currently experiencing. A lot of people "in love" or infatuated type sx first even though they are not. Anyone can fall madly in love, I imagine, or become obsessed with another person. That alone does not point to sx first instinct. It is a pattern of behavior and impulses that would be easy to date back to childhood. I can easily see sx first instinct dating back to my earliest childhood memories and further back than that when I ask my mom and others who have known me since I was a small child.
Below is the summarized versions of the types I found here. If any seem more probable let me know and I will send you the description from the book. I was raised by an E1 so/sp mother and the description of so 1 fits her pretty well.
Edit: My stepdad was an E1 sp/so and it fits him too.
Look at the essence of each type, try to be objective about yourself (can be hard to do). I suggest asking a good friend who will be honest with you when doing this. This may lead to some strange conversation where misunderstandings can be resolved. There are things we do not want to acknowledge in ourselves so a good friend with no qualms about hurting feelings might be even more useful.
It would be nice if they are tactful people but not everyone is. Do not ask anyone who loves you so much they do not see or want to admit any flaws. Also do not ask anyone you sense may have jealousy or personal biases against you on some level. They will make you seem worse than you are. :/ Just ask someone you trust to be truthful even if it might be a little painful to hear. If you don't want to put the effort into it then perhaps enneagram is not something that will be helpful in your quest for self knowledge and understanding.
I hope this is helpful in some way. It took me a while to really get to the heart of my own type and motivations. I have fluctuated from one extreme to the the other on the scale of health levels. I am firmly in the healthy range right now but I know I am one major crisis away from slipping backwards. Then I will be faced with choices that I hope to make with full conscious awareness of the consequences, good or bad.I have to be a bit more diligent and aware of what I am doing. I am getting there.
Naranjo's Profiles of Instinctual Variants
This is a summary of Naranjo's presentation of enneagram types and instinctual subtypes at the International Enneagram Association Conference. Naranjo commented that he doesn't like to teach enneagram types as simply information to be memorized but that learning enneagram should be experiential, that enneagram is like a map that organizes various types and levels of spiritual work, not a spiritual practice in itself.
Related links:
Naranjo's instinctual variants discussion thread
Intro to Naranjo's "Character and Neurosis" (pdf)
27 Subtypes by Beatrice Chestnut (soundcloud)
NN is short for "neurotic need".
1s generally: SX are the reformers, minding others' business, perfecting others. SO are perfect already. SP worries too much. Problem of morality vs. moralism
SX-1 - An animal in heat. Anger infuses desire. "I have to have it and I have a right to it." Example: diamond mines in Africa - feeling that "I did the work to get the diamonds and what would the Africans use them for anyhow? They don't know what to do with diamonds, they don't appreciate them." The conquistador. I have a right to what is wanted. No shame in wanting what's not appropriate - asks "Why Not???" in response to questions of appropriateness. Rhinoceros of a person
SO-1 - Unadaptable. Rigid, school teacher mentality. "I'm going to tell you how it is." Aristocratic. My way is right; others must adapt to me. Tendency to adhere to a particular way of doing things, like a scholar who is such in every sense of the word, but hangs on to a bad accent and grammar from his or her home country and refuses to adapt to new environment. The model. The one that already knows and doesn't need to learn from others. NN for superiority. Make others wrong to have power over them.
SP-1 - Passion for worrying. Not just behavioral - there's a need to worry. Need to know how it's going to happen. Fusses over details. Must have everything taken care of.
2s generally: "helper" is not a good word for 2. They're not really helpful but strategically helpful. Inconsistent with offers of help.
SX-2 - Seducer. Expression of feeling and compliments to get your allegiances. Dangerous beauty - needs to have a hold of you, might eat you up. Needs to seduce, desire for other. Helen of Troy - woman for whom men went to war and lost their lives. Wants EVERYTHING - wants someone to give them everything - it might be material, might be pampering, whatever - but they want everything to come from the other. Some people of this type fill the archetype of the dumb blonde because they might not feel like they need to develop their intellect.
SO-2 - Leader type. Wants to be important. Ambition to stand above, to have influence and advantages. Stuffy. More civilized, less voluptuous than SX, more adult than SP.
SP-2 - More childlike than the other two subtypes. There is inherent cuteness, less adult. "Infantile" by psychoanaytic standards. "ME" is the most important, in a child like way, a child-like importance. Wants to be loved just for being. Their needs for love is quite naked. They use remaining little for gain. Pretend to be unadulterated.
SX-3 - Wants to be good in a different sense of the word - beautiful, attractive, masculine or feminine depending on gender. They are pleasers. It doesn't have to be sexualized - it's way more subtle than that. A woman might have a passion for family and being so good, needing those close to her to see her as wonderful. Promotes and supports "key" others.
SO-3 - Corporate greed, so concentrated on doing something right that they don't see the flaws in their methods. Compassion for brilliance, doing job as best as can be done. Worldliness. Prestige - need everone's approval, not just some people's. Isn't in DSM IV as having anything wrong with this type[this note may apply to 3s in general].
SP-3 - Has the vanity of having no vanity. So determined to be good, to be how a person should be (good housewife, good father, good worker, good monk, etc) and that implies vanity. Difficult to recognize SP 3 as a 3. NN is to be good. Security - autonomy - taking care of one self. Do for self 1st. The kind of person that you go to for advice.
4s generally: The subtypes among 4s are more differentiated than with other enneatypes - more striking differences between these.
SX-4 - Shameless. Even if it's shameful, I will stil get what I want, do anything to satisfy my desires. The more I complain, the more I get (this strategy works well as child, but not as adult). Viking ENVY, cannabalistic drive, competitive hate. Oral aggression - wishing mixed with anger. Sin of Cain - I envy you therefore I kill you. If I envy wealth, I start a revolution. Hateful, outspoken with anger, envy as competition.
SO-4 - laments too much, too weepy, too often the victim, self-sabotaging, oversensitive, suffering more than others. NN to suffer - a child suffers to attract mother's love/attention - the way to happiness is through tears. Depends too much on others to ease suffering. Feels guilty for any wish. Most shameful. NN for self-abasement, compares self to others and winds up at the bottom of the ladder. Uncompetitive, insisting something's wrong with me.
SP-4 - Loves suffering. Person who's learned to swallow a lot. Has learned to endure pain without wincing. "see how much I don't complain, don't ask for things - can you love me now??" Passion/NN is to endure - makes a career of enduring. Trains self in pain, like Lawrence of Arabia putting out the match with his fingers, able to endure the desert even the Arabs couldn't. Masochism.
5s generally: Are the most monochromatic - it's hard to tell the subtypes apart
SX-5 - Not easy to see the difference at first. But if you engage them in conversation long enough, you'll find they are passionate about the one person (usually someone they can't find). Search for absolute love and it's too hard for others to pass the test. Very easily disappointed. Looking to trust in another - the one that will be with you and for you no matter what, beyond the level of marriage vows. Romantic. The non-5 among 5s, though not completely apparent until you touch the spot. Example is Chopin - he was described as like an oyster with powdered sugar inside. He was aristocratic & stiff, and open only to a few people in his life. But his feeling life was expressed through music.
SO-5 - More out there, totem. Need for super ideals. Relates to ideas, not people. Like Midas - wants everything he touches to be gold. Looking for super value, the elixir of meaning. Image oriented. So obsessed with idea loses engagement in life. NEED for extraordinary. Polarity between extraordinary-ness and meaninglessness. Everything is meaningless unless ultimate meaning is found. Need for ultimate instead of what is there.
SP-5 - The most 5ish 5. Passion for sanctuary/hiddenness. Needs to be walled in, hides like a wolf in its lair. Needs to keep people out thru castle walls. Problems with expressiveness - the least expressive type.
SX-6 - The counterphobic, turning against fear. Strength. Bulldog. More barking than biting, fierce looking. NN for intimidation. Best defense is an attack. These are the mad men who go against danger. Naranjo told a fable about a guy who bought a gun to shoot birds that were invading his house (? something like that), then accidentally shoots his guardian angel.
SO-6 - Cold, prussian character. A little like 3 in efficiency. Duty is utmost - but that doesn't mean they actually do their duty, but that they are concerned about it all the time - NN to have those points of reference. Disconnected from intuition. Can be very precise and intolerance of ambiguity.
SP-6 - Fear of no protection. Warm, teddy bears, want to feel the warm embrace of family, where there are no enemies (family of utmost importance to this type). The alliance former - makes bargains "I won't hurt you, you won't hurt me", bringing people together in the presence of a common enemy. Allows too much ambiguity. Rabbit.
SX-7 - Heavenly. Glutton for things of the higher world. Dreamer. Passion to imagine something better than [stark] reality, to embellish reality. Looking at all things with optimism of someone who's in love. Too enthusiastic. NN to go for the sweetness of the imagined over ordinary reality. Need to fantasize. Rose-colored spectacles. Oral optimistic character (I think this was a Freudian reference). "I'm OK, You're OK" - which is a therapeutic theme for anyone but a 7.
SO-7 - pure, too pure, counter-gluttony, concerned about diet, image, etc (new age fashion culture an example). "I will define myself anti-pig". They sacrifice gluttony - it's the postponement of desires for the ideal. Have gluttony for recognition of their sacrifice. Want to be seen as very, very good. Trying to be good according to social consensus. Goodness for applause. Reach ideal of perfection, but it's not innate perfectionism, it's efforted.
SP-7 - Keeper of the castle, makes alliances, family oriented, but not in the real sense of the word. The family game can be played anywhere - "I'll be family with you and expect same of you; we band together to create a mafia." Partisanship, corruption. Self-interest is behind the alliance, but it's denied. Opportunistic. Has to make every experience into an advantage. Gluttony is excessive concern for self-preservation so they make deals at every possible opportunity. There is no conversation that doesn't lead to business - nose is always in the air for opportunity.
8s generally: don't seek self knowledge, gravitate towards cynicism, hardening. Love issues are not accessible. A lot of repression of tenderness & inner child
SX-8 - Anti-social tendency. Rebellious. More provocative than SO, SP. Out front saying "my values are different from the norm". Hysterical, emotional 8. Possession of the scene in total, a little like being the center. Power comes through seductiveness and fascination. Colored feathers.
SO-8 - Punitive in defense of mother. A social anti-social. Example: a mother is abused by husband, the 8 child violently defends mother - it's a violence of solidarity. Ichazo used the word "friendship" for this subtype. Naranjo's word is "complicity". Related to loyalty. Child in example becomes anti-father, therefore anti-school, anti-authority, anti-intellectual. Underneath is something like an oedipus complex - to get mother love. It's hard to see the need for mother beneath the loyalty. Hard to make love-needs conscious (this is true with everyone, but more with this type). Most loyal of the 3 subtypes. The only 8 intellectual is the social 8.
SP-8 - Satisfaction. "It's mine; I have to get it." Intolerance of frustration of desires. Most armed of 8s. Doesn't need to talk too much. Lion only moves when hungry. No nonsense, no word play. Exaggerated selfishness. Know how to do business, bargain, get upper hand over anyone. Survival is the utmost. More action, not talk.
9s generally: Very loving people but deep down don't feel loved, they are resigned.
SX-9 - Union/fusion/symbiosis/confluence. Needs to be through another. Fuses with one other. Use relationship to feed your being because you don't stand on your own 2 feet - stands through the other. Suspicious tenderness. Nobodies, not living with passion. Too dispassionate. "Nowhere Man". Not noticable - wallflower. Erased from family picture. "She eats but no one has seen her chew." Betrays own needs.
SO-9 - Jolly good fellow. Light hearted, merry. Passion of participation, to feel a part of. Doesn't feel a part of to begin with, feels doesn't have what it takes to fit. Very mindful of group "other"; they fuse with the group. Good leader, unselfish, sacrificial. Passion of paying for ticket to group admission. Workaholic. Believes not to show pain or weigh others down with own woes.
SP-9 - Appetite. Sancho Panza. I eat therefore I am. I sleep, I have, I want creature comforts. No metaphysical level of thinking. Can't talk about Being. Substitution of bottle for mother's breast was so complete that they are fused with their body. "Homo economicus" - the double chinned banker. Very practical people.