I have fond memories of the classic Disney cartoons from the 90s. Darkwing Duck, Talespin, Gargoyles...

Hard to say which one is my favorite. Probably Gargoyles. Let's see how the live action reboot turns out. I hope they can get Jonathan Frakes on board.

Adventure Time.

From my childhood its going to be Grim Adventures and Ed Edd n Eddy. Early Spongebob is going to round out my top 3.

Invader Zim!

Ren & Stimpy. No wait, Space Ghost Coast to Coast. Or maybe Futurama. I like 'em weird.

Loony Tunes and Merry Melodies. Love me some Bugs. Animaniacs holds a similar place.

Probably Samurai Jack.

Avatar: The Last Airbender

Doug

Regular show

I really liked Rocko’s Modern Life!

Tom and Jerry (obviously), Doraemon.... Aaaand I think that's about it?

I recently discovered Primal. I always loved Tartakovsky (powerpuff girls, Dexter) but this last one is too of the notch!

Scooby Doo!

Individual cartoon? "Billy Boy" from 1954, and "Feed the Kitty" from 1952 are among my perennial favorites. Comic strips? Calvin and Hobbes, The Far Side, Dykes to Watch Out For, always come to mind.
Comic books? Saga, and Bone are both excellent.

Venture Brothers, followed closely by Space King

Camp Lazlo.

Just wall-to-wall cartoon shenanigans.