I hope I may answer as a most-likely-but-still-not-entirely-sure ISFJ.
I was going through a very depressed, completely isolated, self-loathing, miserable, Fe-repressing, period (great way to start, hm?

), during which time, my crazybrain decided it was the perfect opportunity--in the absence of any outside influence--to try to figure out What I Want, Who I Am, What I'm Doing With My Life, Why I Suck So Bad etc., by way of understanding why I do X, think Y, feel Z, what that means, what it says about me, blah blah blah (and all in backward, distorted, irrational, ineffective, and usually recursive form, as is the case with my depressions). I was reading something online, found an MBTI test, scored INTP (lol), wanted to learn more, and found this place. So, basically, my initial reasons were entirely selfish ones; I wanted to learn/hear more about MEEEEEEEEEE. Since having shed most of the depression and attendant obsessive, self-absorbed thinking habits, and adopting a more honest, easy, accepting approach to self-understanding (IOW, taking my ass to therapy

), I use it to try to better understand and communicate more effectively with people in my life, where and when I deem it appropriate to do so.
I don't know that I can really be
INTO typology (I kinda skate along the top of it) in the sense that I never really know if I'm understanding it or anyone here correctly when they talk about certain aspects of/theories; theory decidedly isn't my strong suit, nor something I always have patience enough for. It does sometimes become exhausting having to fight through my tendency to take words literally (in the absence of accompanied body language/intonation/etc.) combined with the fact that I still don't have stellar confidence, which means I can end up equating that tendency with my being stupid--especially when I need to keep asking for clarification because I don't know which of the possible interpretations I came up with was the intended one (inferior Ne?) which makes me feel like a bother. But any frustrations/insecurities I feel here are far exceeded by the fun, challenge, interest, and fascination it offers me. I do a lot more reading than participating, however, and I don't feel like I know how to mix into the more social/friend-making part. All that said, I sort of come when the mood strikes, and leave when it does, which explains my not-exactly-prolific posting history.
Not sure if that's SJish enough, but there it is.
