I've been familiar with MBTI for a while now. I know that I'm pretty much definitely INXX, but have always been conflicted about the other functions. I've looked at the order of the functions and all that, but it doesn't help that much, I still find it hard to distinguish whether I'm INFP, INTP, INFJ, or INTJ. When I first did the test when I was young I got INFP. Usually I get either INFP or INFJ. TBH, none of the descriptions really ring true for me, but I guess INFP would be my best guess if I were to make one.
I don't have time now, but later I'll say more about myself.
Till then, any tips on distinguishing between these types?