I'm desirably young. Anyway, I've watched a ton of TV but keep in mind, pre-2000 you lost me, and here are 10 of my favorite. These, in no way, reflect the best shows of all time. I haven't seen Twin Peaks, The Wonder Years, The Wire, Arrested Development, and the list goes on... But I definitely love these 10 shows.. so in some kind of order

1. Aqua Teen Hunger Force
2. The Office (British Version)
3. Rocko's Modern Life
4. KaBlam!
5. Scrubs
6. Futurama
7. Everybody Hates Chris
8. Oh Yeah! Cartoons
9. Around the Horn
10. 30 Rock

Of all time, huh?

I would say:

1. Seinfeld
2. Star Trek: Deep Space Nine
3. The Adventures of Brisco County Junior
4. Lost
5. Survivor
6. M.A.S.H.
7. Hercules (yes, the cheesy one with Kevin Sorbo)
8. Avatar: The Last Airbender
9. Star Trek: The Next Generation
10. Tie between Heroes and Prison Break. Prison Break had the clear edge after the first season, but the last season of Heroes made up a lot of ground.