In no order:
Avatar The Last Airbender
Star Wars The Clone Wars
Adventure Time (I loved this show)
The Legend or Kora (not as good as The Last Airbender but still good)
Scooby Doo mystery inc.
And probably others but these are off the top of my head.
I never watched cartoons because it was made for low iq kids and I wasn't retarded when I was young, I had hobbies and passions and I was investing in self education instead of mindlessly watching cartoons