I'm a teenager, slightly sadistic, and I hate the whole "emo" thing. I like it when people can type legibly, and people who use "leet speak" drive me to the edge of insanity.
Anime, Halo 3, random pictures (I have a horde of them), and programming (though I don't really know how)
Futurama and Family Guy.
Too many to post, too few that I can think of off the top of my head.
Worldless music and music with lyrics that're so ridiculous they practically can't be called lyrics. Scooter and Apocolyptica.