I have been observing the romantic dynamics of different sociotypes, and would like to mention them for purposes of correction or addition by you guys.
LSI men are really jealous but don't show it, and instead find a way to punish you for making them jealous. They express their doubts in form of accusations and nudges, for example:"I know you had fun Saturday night, I know you had a wild night so stop saying you were in bed" to see your reaction and affirm whether you were loyal or lying. They like to fund things and feel important if you ask them for financial help. They aren't good with surprises, and will buy something for you if you tell them exactly what you want. Also, most LSI men are funnily in some kind of relationship with people in relationships; they are attracted to girls in relationships probably because they seem like a prize to be won from someone else? (These include personal experiences, which is why I started with LSI). LSIs tend to have a "main chick" who they take up financially and do anything for, and then have one or more side chicks on the side.
EIEs ( and IEEs to some extent) like to ask for financial help (they expect it) and will mostly be the ones sending the "Hey, I need a favour. Please send me ..., I'll pay you later" but never pay back. EIEs are also very good at manipulation, especially when they want to get attention. I don't have much on EIEs yet.
ESEs like to be adored and go to extents of flirting with other people's boyfriends or trying to make themselves attractive to other people's boyfriends then play the victim, like "He's hitting on me yet she's my friend. What do I do? He keeps texting and I can't tell her." I've observed this with so many ESEs. They are also very controlling in their relationships, and this pushes many people away.
SLEs are very loyal once they get into a relationship, and take up the other partner's financial burdens as long as they are loyal. I haven't observed much from them, except that they are very business-oriented.
IEEs will try and make everything enjoyable, to every minute activity so that they have an impact. Like, "See, I can even make walking to the kitchen fun, so stay with me". They like it when someone takes control financially. They may be prone to making hurtful statements and don't really have a filter. They also have a tendency to idealize other people and down play their SO's good traits.
Se types don't care if you are in a relationship when they like you, they see it as a feat being able to make you like them (the other person loses).
Ni and Ne types like the other person to control things financially.
That's all I have, most of it is negative hehe.