The nature of the universe, porn.
People who say funny things. Intentionally or otherwise ;) (George W. Bush, I'm looking at you , buddy)
Super-condensed list: A Tribe Called Quest, 311, Sublime, Outkast, Tom Petty and the Heartbreakers, Warren Zevon, DJ Shadow, the Meters, Blackalicious, J5, Ugly Duckling, Del the Funkyhomosapien, so many many many more.
Some faves include: Super Troopers, Spaceballs, Blazing Saddles, Half Baked, the Jerk, Out of Sight, Star Wars old and new, Three Kings, anything with John Cusak is probably quality, too.
No cable means a lot of DVDs. South Park, Simpsons, Mr. Show, Family Guy, The State, Curb Your Enthusiasm...
Lately: Dude Where's My Country? by Michael Moore, Diary by Chuck Palahniuk, Dune--the Machine Crusade by Brian Herbert and Kevin J. Anderson, Harry Potter and the Order of the Phoenix by J.K. Rowling, the Four Agreements by Don Miguel Ruiz, Number9Dream by David Mitchell, the Da Vinci Code by Dan Brown.
Anyone who can get Bush out of the White House.