GirlsAloudFan
Blue Crack Addict
Buffy TVS (does this count? Half of it was aired in this decade)
See, I'm not sure. I was thinking maybe it shouldn't count...I feel it's more of a 90's show even though, like you said, it aired through to the 2000s. If it counts, then it would toss a wrench into my entire list. I also forgot all about Curb Your Enthusiasm. I will do a revised list now.
1. Gilmore Girls
2. Lost
3. Buffy the Vampire Slayer
4. Arrested Development
5. American Idol
6. Six Feet Under
7. 30 Rock
8. Veronica Mars
9. It's Always Sunny In Philadelphia
10. Gossip Girl
11. Curb Your Enthusiasm