I have a small selection of shows that I watch...
Futurama
Family Guy
American Dad
Everybody Loves Raymond
Seinfeld
According to Jim
The Office
The Amazing Race
Jon Stewart
Colbert Report
Nightline
I can't really stand anything else. Most TV shows these days seem to try to get a laugh out of us every 5 seconds. Everything is a clever, witty, hip joke... there's hardly a story anymore. The Office is going down that road, sadly. I only keep up with it nowadays because I've grown attached to the characters over the years, but it will never be as great as it was in Seasons 2-4.
I used to watch Lost religiously. I don't think I'll ever find a TV series as awesome to me as Lost.
The Amazing Race is the only reality television show I can enjoy, and I enjoy it a lot. I can't watch The Real World, that shit makes me want to deep-fry my head. I occasionally watch The Challenge with my brother. It's not too bad, because they're actually doing fun challenges and it's interesting to see how two friends or polar-opposite people interact when they're in the battlefield (either against each other or in alliance).
I guess I watch a medium amount of TV. I watch a lot of anime on my computer. I try to look for a high quality series to watch, so that means most of the shows I watch are 12-26 episodes long. I used to keep up with Bleach, but not so much anymore because it's kind of going in circles, but I think I'll give it a second shot some day. I don't watch Naruto, Inuyasha, or any of that crap. My favorite anime series is Clannad. If you love anime, give it a shot.