Up until very recently, I wanted to be an animator (I blame Rocko's "Wacky Delly"), so I've always been all the hell into cartoons
Some of my favorites:
Rocko's Modern Life, Angry Beavers, Courage the Cowardly Dog, Foster's Home for Imaginary Friends, Animaniacs, The Tick, and Futurama
Chowder and Flapjack are pretty good, but not among my favorites.
I also like the earlier episodes of The Simpsons and Family Guy, but both shows have kind of deteriorated overtime.
Also, the Super Mario Brothers Super Show. Because it's so bad it's good.