Twin Peaks - It's my favorite tv show of all time. Nothing else comes anywhere close in my opinion. Its by my favorite movie director David Lynch. It has everything comedy, horror, drama, mystery and of course surrealism. I cant say enough about Twin Peaks and its quirky residents, its just a show that oozes style. And I think everyone should at least give it a chance.
Arrested Development - The smartest comedy series ever. Unlike most comedies you actually have to see every episode to get the jokes and understand whats going on. And its just surprising to find a comedy series with so much going on.
Both those shows are long gone though. The only series i watch that still comes on is The IT Crowd. Its a hilarious british comedy about IT nerds.
Honorable Mentions: Spaced, Dexter, Its Always Sunny, X-Files, Buffy, Seinfeld, Flight of the Conchords, 3rd Rock From the Sun, Carnivale, Freaks and Geeks, Party Down
Now Space Ghost regrets his action. "Why," he says, "do we always hurt the one we love? Why, Banjo? Why? Banjo! Banjo! Baaannjo!"