I'm into linguistics, anthropology, music (I play guitar and sing, as well as listen to a vast variety), books (I read a lot), comics, film, vegetarianism, co-ops, politics, Buddhism, philosophy, and really anything that gets my attention.
(Actually, I already know these guys... but the band seriously rocks.)
The Alkaline Trio, Andreyka, Aphex Twin, Avenged Sevenfold, Bandits of the Acoustic Revolution, The Beatles, Seth Bernard, Blind Melon, Boards of Canada, Breathe Owl Breathe, Bright Eyes, Broken Social Scene, Captain Beefheart, Johnny Cash, Circa Survive, Eric Clapton, Coheed and Cambria, Cursive, Daisy May, The Dandy Warhols, Derek and the Dominos, Dispatch, Dredg, Electric Violet, Explosions in the Sky, The Fall of Troy, The Flaming Lips, Flogging Molly, Ben Folds, Gnarls Barkley, Godspeed You! Black Emperor, Gogol Bordello, Green Day, George Harrison, Harvey Danger, The (International) Noise Conspiracy, Iron & Wine, Jimmy Eat World, King Crimson, Ben Kweller, Lagwagon, Lamb, Led Zeppelin, John Lennon, The Long Hairz Collective, The Mars Volta, Bob Marley, Matisyahu, Modest Mouse, Mogwai, Muse, ยต-Ziq, Mustard Plug, My Bloody Valentine, Nada Surf, Nine Inch Nails, NoFX, Oysterhead, Ozma, Pavement, Pink Floyd, The Postal Service, Primus, Propagandhi, The Raconteurs, Radiohead, Ramones, Rancid, Refused, REM, Rent, Rilo Kiley, Rise Against, Rush, Rusted Root, Rx Bandits, Sigur Ros, The Smashing Pumpkins, The Sound of Animals Fighting, Sonic Youth, Squarepusher, Streetlight Manifesto, System of a Down, Talking Heads, Third Eye Blind, Tool, Weezer, Wilco, The White Stripes, The Who, Whole Wheat Bread. I like music.
Anything written or directed by Hayao Miyazaki, Darren Aronofsky, Quentin Tarantino, Kevin Smith, Michel Gondry, Wes Anderson, or Charlie Kaufman (plus others), Almost Famous, American Beauty, Waking Life, Sin City, Serenity, SLC Punk, The Lord of the Rings, Akira, The Matrix (the first one), I ♥ Huckabees, Sideways, Donnie Darko, Mulholland Drive, and many others.
The Daily Show, Firefly, some of the stuff on Adult Swim, and Star Trek: The Next Generation. Other than that, I'm really not a big fan.
Anything by Jack Kerouac, Daniel Quinn, Kurt Vonnegut, Philip K. Dick, Ayn Rand (though I don't really agree with her, per se), Neal Stephenson or any number of authors whose names escape me. Also: the "His Dark Materials" trilogy by Philip Pullman, Middlesex by Jeffrey Eugenides, the Harry Potter books, Hardcore Zen by Brad Warner, Zen Mind, Beginner's Mind by Shunryu Suzuki, Life of Pi by Yann Martel, The Electric Kool-Aid Acid Test by Tom Wolfe, Foucault's Pendulum by Umberto Eco, any religious text, and, seriously, many, many more.
Jack Kerouac, Noam Chomsky, Allen Ginsberg, Kurt Vonnegut, Siddhartha Gautama, Jesus, Lao Tzu, George Harrison, John Lennon, and a whole bunch of other cool people whose work has changed my life or who have positively changed the world.