Angel? It had 5 seasons, but everyone who watched it knows it got canceled... it had a lot of potential to continue at the time and it was just... dropped.

I did have another one, but age and forgetfulness has happened and I cant seem to remember what it was I was thinking only 10 seconds ago... >.<

EDIT: Dead Like me
EDIT2: Close your eyes and focus on the words, this is why DLM is such an awesome show.