Oh man, I totally forgot about Futurama, The Big Bang Theory, and Flight of the Conchords. And the West Wing. And North and South (another mini-series).Flight of the Conchords
Freaks and Geeks
Didn't make top 5 but I still love: Futurama, 30 rock, The Big Bang Theory, Undergrads, Death Note, Ouran High School Host Club, Dollhouse, Scrubs, How I met your mother, Veronica Mars, Ugly Betty, The Office, Clone High, It's Always Sunny In Philadelphia...
There's a lot more but I feel I've said enough XD. Yay for tv!