The music on my iPod includes, but is by no means limited to: Queen, Bach, Weird Al, Daft Punk, Green Day, and Pink Floyd.
I read so much as a child that I absorbed the rules of English spelling and can now spell pretty much any word (excepting loanwords) perfectly even if I've never actually heard it before. Come to think of it, I tend to absorb that kind of syntactic rules instinctively in general; I've also learned to identify whether people are worth talking to based on how they write (I'm not being elitist, just saying that there are certain hallmarks that tell a lot about a person) -- although there have been a couple of notable exceptions -- and I don't think I've ever accidentally ended up reading a bad fanfic if I had the opportunity to see an author-written summary.
I need to either think out loud or write my thoughts down to make them clear rather than jumbled and repetitious.
My eyes are weird; they look different in different lights (at least, I think that's it, rather than the pigment actually changing) and I can never be sure if they're really blue, green or grey.
I use a mishmash of British and American English grammar and spelling, partly because I'm Canadian and partly because I'm an Anglophile and enjoy affecting British turns of phrase (although I'd stop short of putting on a British accent or totally converting to British English, because that seems too pretentious).
I catch a ton of colds, but virtually never come down with anything worse than that.
My sleep cycle is approximately 26 hours long; I don't go to bed or get up at a remotely consistent time. I also seem to be nocturnal even if you account for the length difference. For reasons unknown but probably related, I also nearly always get tired again about three hours (although it can sometimes fall anywhere from two to five) after waking up.
I have a mental age that is quite literally older than my chronological age, and have been this way for most if not all of my life; when I was 9-12 I acted like I was closer to 14-17 (with the ends of each age range matching up, that is), and now that I'm sixteen I behave and think like a twentysomething. I also learned how to correctly use a semicolon when I was about eleven.
I can't do this kind of thing on purpose or else I'd have done something more important with it, but a couple years ago I was alerted to the fact that one of my friends was online while I was lying in bed, half-asleep (I hadn't even opened my eyelids, let alone turned on my monitor), with no way of obtaining this knowledge through normal channels.
I'm asexual. For a while I thought I might be a lesbian, but then I realised that I'd never actually been attracted to a member of either sex (whether local, celebrity or fictional), just had an aesthetic appreciation for their looks.