I'm not sure. Your explanation as to why you typed as ISFJ made sense to me, but it doesn't resonate with me as much as INFP. 9 also seems more prominent in you than either 6 or 2. I think that could be an alternative explanation as to why you seem to have more Fe than Fi - a strong 9 core/fix. Fi/Si loops also exist. You don't strike me as unhealthy but then again, neither do a lot of 9s. You don't type as one (or E1 [XD - that would be funny]) but it would make sense, as I see 9s being vulnerable to hiding so much of their shit to the point where they don't think they have any shit to hide. Shit being problems, not literal. Of course.
Not sure where I was going with that but yeah. I'm more certain about you being 9w1. I remember reading one of your blog entries about having a magnetic relationship towards drama, which could potentially be explained with this description:
They want to contribute something new and passionate to society, but feel like too much of a social nonentity to do it. They may view themselves as 4ish due to issues around uniqueness, but these issues only arise because of how aware they are that others possess a sense of self, which only reinforces the 9's sense of nothingness....Since they know they lack a strong self, they lack hope about contributing something original. They resolve the quagmire either by spinning their wheels with fruitless and endless self-examination hoping to discover something deep about themselves or by conforming to various personalities and completely checking out. They are dispassionate in general but can seem more passionate, sad, or lively because they comply to a Oneish social instinct in the back of their head telling them how they should react and what's appropriate. They know underneath how internally unaffected they are. They are taken back by the possibilities of things they could imagine happening without stirring a real reaction in them and find it disturbing to think about how they could merge into anything... They can seem 7-like in their draw to books, people, beliefs, and adventures, but they are drawn to these outlets in hopes of receiving a sense of perspective and self. They have a nose for unconscious structures and may create a new language around patterns, themes, or archetypes in myths, traditions, history, and groups. They are easy to mistype because they can seem to run fully on the 'software" or agendas of different types. They may search for approval and validation like a 3, but reject the approval once they get it as if wondering why they would be worthy of admiration or attention in the first place. It's the 'agenda' 'software' itself they are addicted to, not the result.
So something to throw out there, if you're more uncertain about Enneatype. Still think you're INFP but I don't have much of a problem with ISFJ either.
*only interacts with other memes such as (me x2)-self (two negatives = a positive) who regularly use the font comic sans unironically*
All the ones you've had could work from a certain perspective.
'Consciousness is not simply a sensory-perceptual affair, a matter of mental imagery, as the contents of our mind would have us believe. It is deeply enmeshed with the brain mechanisms that automatically promote action readiness' - Jaak Panksepp