Stuff I like:
Mythbusters
Tripping the Rift
Various specials on the History Channel and Discovery Channel
Special Report with Brit Hume
NFL football
TMC Network--(Great classic movies)
Dog, The Bounty Hunter
Cops
Stuff I don't like:
Don't know, don't watch...
I've found Dog the Bounty Hunter to make educational, albeit painful viewing. An endless succession of drug-destroyed lives and drug-blighted neighborhoods. It's not so much entertaining as monotonously tragic.
If you like MythBusters, you might like Good Eats. It's sort of a cooking for science geeks type show.