Pushing Daisies deserved better. I also had a soft spot for You, Me, and the Apocalypse...wish I could have seen how the bunker twist played out!
Better Off Ted was a great comedy that could have easily hit the 100 episode mark for syndication.
Happy Endings. I can't tell if that's just because I got so invested in the characters but I think they could've continued churning out really fantastic material...
Freaks and Geeks being cancelled after only one season is still god damn tragic
The Sarah Connor Chronicles and My So Called Life
What made The Grinder funniest to me was when they got super meta, and I don't think they would've done that if they'd been picked up for a second season. I'm torn on that one
BORED TO DEATH
A modern day retelling of David and Goliath set in a fictional absolute monarchy with a fantastic cast.
Too bad the writing was atrocious.
"Forever" --still one of the best series I've ever seen
Rome (HBO). Boss (Starz). Utopia (Channel 4 in UK). Hannibal (NBC). Dirk Gently's Holistic Detective Agency (BBC America).
I would give more seasons for The Leftovers, Banshee, Black Sails, Penny Dreadful, The Knick, Quarry.
Here's one you don't see too often: [Reaper (The CW)](https://en.wikipedia.org/wiki/Reaper
Ray Wise as the Devil. I mean, that's all that needs to be said about it.
It was cheesy, but it was amazing.
Deadwood for another season or two.
Pushing Daisies was cancelled after 22 episodes, a true tragedy.
I was very bummed with the cancellation of Forever. I guess it didn't get the ratings but I really liked the premise for it being a police procedural.
* Jericho - very rushed "ending"
* Flash Forward
There was a sitcom called "Sirens" about EMTs that had 2 seasons, I really can't imagine how it got cancelled.