I've come to realize I'm an ENFP, despite thinking I was an INFP and then an INTP for a while. I'm actually quite extraverted, I just have a decent amount of social anxiety and a need for "alone time". But when I think about it I'm much more likely to initiate conversation than the average person, and I do get energy from being around people.
However, the last time I took the online Socionics test I got LII/INTj, which is usually associated with INTP, though my scoring was also very close to ENTp, INFj, and INTp.
LII's are considered to be quite "cold" personalities, but I would say I'm rather warm in a lot of ways. Like tonight I just had a conversation with a homeless man and gave him 5 bucks and a cigarette, most people probably would have tried to avoid him. However a good friend of mine said I come off as "stiff". I think I'm definitely more of a Fi user than a Fe user, though I buck the Fi stereotype by being pretty friendly and open, which is in part because I value treating people that way as a principle.