Rick and Morty. I'm almost embarrassed by what a fan boy I've become. Adventure Time, Steven Universe, Star vs the forces of evil, Gravity Falls are all great of the more recent shows. Johnny Quest, Scooby-Doo, the old bugs bunny on the old end. I almost forgot the cartoon network stuff. Samurai Jack, Dexter's laboratory, Powerpuff Girls, Courage the Cowardly Dog. There's so many.
All the old Bugs Bunny cartoons. Not the Bugs Bunny/Roadrunner Show, either. Just Bugs Bunny. Lately however, since a lot of my time is spent with a 5-year-old, I've developed an appreciation for The Lion Guard and Sabrina the First. Disney animation is still better than just about anything else. Can't stand so much of new animation.
Although I've already posted BEEP BEEP for the Road Runner for when I was a kid (and I ended up half the night watching Wyle E Coyote blowing himself up with various ACME products because of this post haha!!) if I get REALLY REALLY stoned, I laugh my ass off at Beavis and Butthead.
Ren And Stimpy forever....earlier better than later series...but liked those too...Venture Brothers makes me laugh more than any other cartoon...Archer is always good...South Park is a 90% hit for me...which is pretty good for so many seasons....Space Ghost Coast to Coast for silliness...and Beavis And Butthead, just because those characters aren't too far off some of the people I have known in my life.