I think KOTH is severely underrated (I won't go so far as to put it in the top 5 though). I forget it's still on and then accidentally catch an episode and it's always enjoyable.
While I'm sad that KOTH is cancelled, 13 seasons is a good long run. I have no use for Seth McFarland's output, so that's less Sunday night TV to forget to watch.
I would also love more Futurama. The longer form straight to DVD episodes have been a lot of fun. Just saw "The Beast with a Billion Backs" this week and laughed more than during the last 4 seasons of the Simpsons.