There used to be two episodes of Courage the Cowardly Dog on CN every weekday afternoon. I love Courage.
Both timeslots were recently filled by Sidekick and Almost Naked Animals. I was able to get through an episode of Sidekick but I quit watching ANA very quickly. Rage.
I still enjoy Regular Show, Adventure Time, Ed Edd & Eddy, Tom & Jerry, Looney Tunes, and The Amazing World of Gumball (it's alright), but I suppose the older of these will get replaced sooner or later.