I always had a soft spot for the Network blocks of the late 80's/early 90's. Between ABC/NBC/CBS we got The Smurfs, The Real Ghostbusters, Muppet Babies, Pound Puppies, ALF, The Mask, and many many many other classic cartoons that set the standard for children's programming.
I also voted for 'Other', which for me, is the USA NETWORK CARTOON EXPRESS. This was Cartoon Network in bite sized form, and offered virtually any and every Hanna Barbera show on it's block at least briefly, not to mention G.I. Joe, TMNT, The Real Ghostbusters, He-Man, Might Max, Gargoyles, and others over it's run.
The USA CARTOON EXPRESS was what Cartoon Network aspired to be, but never did live up to IMO.