I'm not especially sold on the core enneagram types, nevermind the tritypes. The various descriptions, especially with stackings on top of them, only muddle further a typology that I see no real rationale behind & which I tried to make sense of by seeing how it correlated with the Big Five and MBTI self-typings. But that of course is just a representation of feedback, with people stating how they perceive the types. This may be better than relying one individual's perception and representation, but it does not improve my view of the enneagram.
Essentially, my enneagram self-typing is limited to "9w1 or 5w4 Sp/So", while bearing in mind that others have considered E1 as possible , and So/Sp as possible. I have had various introspections on my enneagram type and tritype in my blog and in threads such as these also: my perceptions of myself are probably rather the same as when the comments were made, even if my understanding of the types has changed. I also bear in mind that, while I do not like the tritypes in their current, undeveloped and nebulous form, based on one analysis of enneagram and MBTI type correlations, 5w4, 4w5, 1w2 may best fit INFJ and 5w4, 4w5, 8w7 may best fit INTJ. This is a large part of why I consider 5w4 as more likely for myself than the E1, and perhaps the E9, and consider 4w5 as a possible primary type. I don't consider this to be especially strong reasoning, but again, it does not seem especially bad in the circumstances either.
I think there is a danger of others caring and spending more time on my enneagram type than myself: it doesn't especially bother me anymore, and is unlikely to do so again with the enneagram in its current form. I don't have a big problem with others speculating on my type for their own ends however.