IT Crowd is an absolute must!

Also, if you want to try something out of comedy, but more in hardcore scary badass heroic epic 80s violence drama friendship horror, with terrific music, top notch editing, excellent acting and above all : absolutely groundbreaking writing (it's written by prodige novelist Garth Marenghi, and also features Garth Marenghi as an actor), I suggest :

Garth Marenghi's Darkplace

(Warning : it is not for the weak hearted. It involves some real creepy concepts that only the twisted mind of genius author Garth Marenghi could come up with. And it's implemented with a devastating finesse.)

try its always sunny in philadelphia

also:

southpark

futurama

pinky and brain

road runner

tom and jerry