Buffy the Vampire Slayer: although it did run for 7 seasons, it was still a good show. I can probably say the same for the spin-off, Angel.
The Norm Show: comedy sitcom starring Norm Macdonald. I thought it was damn funny, but ABC sacked it after season 3.
Clerks, The Animated Series: Only lasted for 8 episodes (only 3 or 4 of which actually aired on ABC before it was cancelled. The 8 can be bought on dvd).
Perfect Strangers: classic, and I'll always miss it.
Mystery Science Theater 3000 (or MST3K): what a great show.
Three shows cancelled before their time have a special place in my heart...
Caprica, I was devastated when Syfy cancelled it midway thru season 1.5 --although I'm glad they got a chance to wrap it up (sorta) in the final 5 episode marathon. That show had lots of potential! :******: Now where will I get my Magda Apanowicz fix? :lovecoupl
And when Terminator TSCC got cancelled, I was about ready to jump off a bridge.
Another great show with GREAT writing was Life (broadcast on NBC), starring Damien Lewis and Sarah Shahi. Great, great show -- which also introduced me to the goddess Christina Hendricks!!!