Why'd they cancel the show?
the creator simply told the story he wanted to tell and is ending the show 
I wish more shows would strive to do that instead of straggling on when they clearly should've been put into a coffin years ago.
What's more painful? Saying goodbye to a good show at its stride when the story ends?
Or watching it falter and burn out over the years but continue on as a hollow corpse that's a joke of its former self?