Father Ted was awesome. Too bad they haven't been running old episodes on the Comedy Channel for years
.
It has become a bit cliched to say this, but I'd say the early to mid 90's run of Simpsons is my favorite. I'm a big fan of Seinfeld, The Kids In The Hall, King of the Hill, and a number of Adult Swim cartoons, but it always comes back to the Simpsons for me.