You can't beat BLACKADDER. Though the first season was never my favourite, all four generations of the snake noir is a classic.
And RED DWARF! This is one of those shows that is so stupid but it works! In fact, so good that America tried to copy it. An exact replica as well! Same characters, situations....but it was a disastrous flop. Proof that British wit should be left to us

ONLY FOOLS AND HORSES. I don't care how old you are, Del Boy will live forever!
If anyone dares mention Two Point Four Children or anything like that, I may have to unleash the Ravenous Bugblatterbeast of Traal. Good day.
....sorry, I've been reading Hitchhiker's Guide to the Galaxy. 'Nother classic!
So, any limeys here got any fovourites? Or perhaps non Brits who happen to have seen such shows? My friend from Arizona for example loves Red Dwarf and Top Gear. But does that even count as a comedy? Who will ever know? Dun dun dunnnn