Don't understand the INTJ?
I found and fell in love with the Myers Briggs personality test a while ago, and indeed our whole family seemed to find it useful when it came to understanding each other. However, for Aragorn and I, as we entered late-teen/early-adult years, our personalities shifted from being fairly identified with Purring Piggy's and Clankeeper's to being strongly identified with an entirely different one. We are, unlike our parents, INTJs. Unfortunately, not only are INTJs rare in any given population, they are odd, quirky, and even cryptic to others. So I have learned from experience. To fit in with normal society, we usually have to play some kind of role.
But if you're at all curious about what really goes on behind how we appear in public, or just want to understand why weird things happen sometimes, this is the place to find it. Be warned: it's bitingly sarcastic and tongue-in-cheek, also brutally honest, and has a few swear words sprinkled in. That being said, take away some of the sarcasm and brutal honesty, and it's so so true. (At least for me; I'm not sure how strongly INTJ Aragorn is.)