Definitely the Simpsons. Seasons 1-10 that is. 11 and 12 were crap. 13 was not much better. Last season was a bit of an improvement and this season was improved even more, although this year what was good was good and what was bad was God Awful. Like that horrid "Catch 'em If You Can" episode. It was my 3rd least favorite episode ever, with Simpsons Safari coming in 2nd and Kill the Alligator and Run being my least favorite.
Other than that Seinfeld, Hogans Heroes, All in the Family (before mike and gloria moved) Sanfred and Son, The Family Guy, and Late Night with Conan O'Brien.