I remember catching one episode and thought it was meh, but watching it recently realize that it's actually pretty hilarious. After hearing Patrick Warburton it's hard to imagine The tick having a different voice, and the guy playing Arthur is pretty good. Unfortunately it only got one season so you don't have that much to catch up on with this show.
Freaks & Geeks
This show launched so many actors careers that it's surprising that it only lasted one season. The episodes basically go through every single experience that will happen when you go to high school. Most of those experience suck, but are funny when looking back on them :p.
Before Shaun of the dead and Hot Fuzz there was Spaced. I mean it was written and starred by Jessica Hynes and Simon Pegg so you know it's gonna be awesome. Oh not convinced yet? It also has Nick Frost. That should be enough for anyone.
Mystery Science Theater 3000
You know that guy behind you at the movie theaters that won't shut the fuck up? Imagine you were watching a horrible movie and instead of being a dumb asshole the dude behind you is fucking hilarious and is making the movie bearable. Yeah it's pretty fucking awesome.