Oh god, have to go back a bit.
Tom and Jerry.
Roadrunner.
Actually, I didn't see many cartoons as a child, we only got a TV when I was about 6. One channel.
Later though, when I had my own kids and watched TV with them, I adored Sesame Street, Animaniacs and got to like Naruto and Yu-Gi-Oh and I loooovvved Thomas The Tank Engine.
Nowadays it's Family Guy and I still like The Simpsons.