I usually only watch shows that do not appeal to the masses, and are thus canceled before being able to wear out their welcome, for instance:
Arrested Development
Firefly
Deadwood
Veronica Mars
Maybe its for the best. . .otherwise these shows might become like the Simpsons. Regarding the cartoon network, I was thinking today that I used to watch it all the time, but I barely flip through there anymore myself. The only show I really watch there is on Adult Swim: the Venture Brothers, which is brilliant, BTW, and actually, I wait until DVD for that. A lot of the other good shows have either gotten stale or been canceled, as you guys say.
On a related topic, I think that a bit of variety on Boomerang would justify my subscribing to that "tier" of channels, but its pretty crummy, too. It has some good shows, but given their library of classic cartoons, it should branch out a bit more, IMO.