Dude, I dedicated a whole day just to figuring out my family and friends' types. It was just endless fun for me and my friend, who is also very much into personality typing.
Me--INFP. Almost ISFP, according to the test.
Mom--INFJ Very suiting, and she liked that her's was the least common. XD
Dad--ENFP. My mom and I were close, we thought he was ESFP. It's sweet (in a cute way) to find that they have supposedly perfect match personalities.
Brother---Also INFJ. He's actually studying to be a psychiatrist.
1st Sister---Didn't get to test her, but I would probably say ESFP. Not sure on S or P. (Maybe her perfectionism makes me think she's a J...)
2nd Sister---ESTJ. Through and through, though she can be F.
3rd Sister---ESFJ. We have supposedly perfect match personalities, which I guess could have developed from how close we were as kids, though I tend to think maybe we just magnetized BECAUSE we had perfect match personalities. (Note: This sister seems to be much more of a thinker over the past few years, so it's possible she always was one.)
4th Sister---ENTP. Really, you would love her. I thought she was weird as a little kid, but now I realize I relate to her more than any of my other sisters, probably to do with that NP going on.
Best friend (girl): ISFJ, though she seems to new acquaintances to be E and T.
Best friend (guy): INFJ? Is it just me or is it hardest to type those you are closest to? I have thought this over quite a lot and I find this is probably what he is, either that or he has my type. I know he had to be NF because we had that 'almost telepathic' communication going on. It was really fun to speak in half sentences and totally frustrate aforementioned best girl friend. (I speak of him in past tense but still include him because even though I've moved and we have fallen off from talking anymore, I still consider him my best friend.)
Typing this out, I just realized that I am the only one of my sisters who is introverted. Q.Q Considering that my three older siblings have already moved out, I guess it's more balanced, having three extraverts and two introverts at home. And, to be fair, my younger sister (Sister #3) is more of a half and half on extra vs. introversion. So I guess that makes up for it. =)