God, music (listening to and playing), chillin' with family and/or friends, watching way too many movies, warm sunny days, cats (seriously they rule), the beach, randomly breaking into song, writing, running, lifting, tapping on tables and various other inanimate objects, et cetera
Your mom.
I like a lot of different kinds of music, but right now the consensus seems to be that I'm obsessed with 90s alt rock. I like classic rock too, as they just don't make 'em like they used to.
There are waaaay too many to list. I'm a filmophile and if I can't be entertained by a movie it must really REALLY suck.
The only TV I watch is usually on DVDs because I don't like to schedule my life around a box (with the exception of LOST). Things like Battlestar Galactica, Heroes, Lost, Firefly, Arrested Development, Family Guy, Robot Chicken, Futurama, The Office, Aqua Teen Hunger Force, The Simpsons, The Daily Show, The Colbert Report, Mystery Science Theatre 3000, Seinfeld (of course), and the occasional South Park
1632, 1633, Tolkien, C.S. Lewis, I Am America! (And You Can Too), Calvin and Hobbes collections
My parents rule, and they're always right. I finally came around to figuring that out many times the hard way. :-P