In real life, I am much the same, but better. ;)
I'm very much an introvert in real life, and not usually quick to speak up. I nearly always prefer to listen than to talk, and think about what I say before saying it (which usually leads to deciding that what I had to say wasn't worth opening my mouth for) and I have a reputation at school for being very silent.
Thanks to being an introvert, living in a tiny village, and homeschooling during my younger years, I was socially awkward when I began going to school, but I can interact normally with other people now. I still usually take a little while to warm up in a social setting though. I also prefer having few good friends to many acquaintances.
I have also always been terrible at explaining things when speaking (my very monotonous voice doesn't help) and am much more comfortable communicating in writing.
I get consistently good grades at school, with my worst subject usually being phys. ed. I work hard (but don't study for half my tests), and often make extra homework for myself (not based on the school curriculum, which I usually dislike), mostly studying languages and linguistics (I recite lists of literally thousands of words in other languages). I'm most interested in the arts, rather than the sciences, though I don't enjoy the way the former are taught in school.
I have always been a huge reader (not weightwise) and at one point was reading over sixty books, magazines, etc. of various genres at the same time. I've slowed down somewhat, devoting more of my time to, well, reading other things (like this forum and Wikipedia articles).
I also have a very active church life and go to most weekday Masses when I don't have school. I'm fairly popular amongst the elderly people there, and I'm sure many of them expect me to become a priest.
I'm a typical bossy big brother much of the time, though I like to think I'm not as critical of my siblings as I used to be. Speaking of which, I used to be very judgemental and full of myself. I think I'm a humbler person than I once was, but it's hard for someone like me to have much humility. ;P (I am a bit of a tease in real life as well as on the Internet.)
I could ramble on and on about myself, I'm sure, but I should stop somewhere. I think I've represented myself fairly, but if not, when my dad reads this thread, he can remind me of all the negative things I've passed over. ;)