Movies, especially Horror, Video Games, Computers, Poker, Chess, Music, Cooking.
People who don't suck
Punk, Emo, Indie, Metal, 80's, Good Rap, The Shady Characters.
Evil Dead triology, Friday the 13ths, Children of the Corn, The Grudge, The Exorcist, Bad Horror in general, Bill and Ted, Biodome, Dumb and Dumber, 3D movies, Office Space, Big Lebowski, Godfather 1 & 2, Rocky 1-4, Star Wars, Star Trek, and way too many other good ones to list.
Arrested Development (RIP), Sopranos, 24, American Idol, Big Love, Curb Your Enthusiasm, Entourage, The Office, The Loop, My Name is Earl, Star Trek, Dog the Bounty Hunter, Good Eats, Iron Chef, Ham on the Street, Aqua Teen Hunger Force, Sealab 2021, The Boondocks, Harvey Birdman, Wonder Showzen, The Andy Milonakis Show, Seinfeld, and (with a guilty expression) Unan1mous and Deal or No Deal. Lots of other shows from time to time too.
Mostly non-fiction, like history and technology. I am currently reading Ray Kurzweil, The Singularity is Near. He writes cool stuff, and it makes me think about what I can do to help create artificial intelligence. I believe it'll happen in our lifetimes.