Shame on everybody in this thread for not saying Arrested Development. It sadly only ran 3 (hilarious) seasons and I think its humour was a bit ahead of its time and audience. I know it was praised by critics but it just never got high enough ratings to continue which fucking sucks because it was awesome and provided us with one of the greatest comedy ensemble casts ever. On the bright side, at least it got cancelled and left us with 3 great seasons of material instead of running on and deteriorating in quality like most long-running TV shows do these days.
This. My absolute favourite American comedy series, I'm always looking for word on the potential AD movie.
I wish Garth Marenghi's Darkplace had gone on longer. It was only 6 episodes in total. Probably only intended to be that long originally anyway, but it was so great that it surely deserved to be 12 episodes.
That's the way Channel 4 tend to commission sit-coms and the like, most have 6 to 8 episodes per season. Spaced, Black Books, Father Ted, Green Wing... Most great British comedy series have very short runs.
I would have to say that "Clerks: The Animated Series" was cancelled far before it's time. It was cancelled after two episodes and only six were made. Those six, by the way, are hilarious. It was a highly clever show and had several classic moments (including the art shift in one episode). I don't know if it would've kept the comedy consistent had it not been cancelled, so it might've been a good thing, but I do believe it was cancelled before it's prime. If you ever get the chance, watch all six episodes. Laughter is guaranteed.
Got the DVD years ago, absolutely fucking loved it. Randall lecturing a man who was gushing blood about the importance of doing away with brand-name association when he asked for a band-aid was bloody priceless.
Whose Line Is It Anyway: I wish this show had never ended as it is the funniest thing I believe I have seen on TV. If Ryan and Collin were brought back at the very least, all the cult fans of this show would watch without question, I cannot name a single episode that didnt have one laugh out loud moment and I feel we would have the same hilarious show if it was brought back.
You do realise that between the original Channel 4 series and the US spin-off that Whose Line actually ran for about 18 years, right? Awesome show though, if you loved that, watch Drew Carey's Improv-A-Ganza on the Game Show Network. It's basically Whose Line without the points.
I'm gonna chip in my own tuppence here, both fairly recent series, first up is Dollhouse. I really enjoyed this and Joss Whedon originally had a five season arc all planned out. It was cancelled midway through the second series and the ending was badly rushed as a result. Shameful.
Next up is Running Wilde, only got one series and features some excellent comic talent in the form of Peter Serafinowicz, Will Arnett and, in the first episode at least, David Cross, which should please the Arrested Development fans amongst us.
Honourable mentions also to Zim, Firefly and Samurai Jack. Some of the scripts floating about for the unmade Zim episodes were amazing and Jack really does need to get back to the past and undo the future that is Aku.
EDIT -
12 Oz Mouse and Harvey Birdman: Attorney At Law are two more series that I'd like to ssee more of. Damn the list goes on and on and on...