Comics, tabletop games, and video games.
I've also got a borderline sexual fascination with fictional depictions of the Soviet Union.
Oh, and I'm a rather cunning linguist.
But the word nerd doesn't mean anything now. Any air-headed girl who plays Bejeweled on her phone and played on the Wii Balance Board in the mall is suddenly a gamer nerd, and any idiot who saw the Watchmen is now some big shot comic nerd. They're diluting our wonderful culture!