I never got into the superhero or robot stuff, so no He-Man or Voltron or Transformers. Never got into Justice League or similar. For me it was all about Bugs Bunny / Roadrunner / Daffy / Sylvester / etc. I always rooted for the coyote and wanted so bad for Sylvester to eat that damn Tweety Bird. I also liked Tom and Jerry. The early Scooby Doos were creepy and fun, but after they started going for laughs with "Scrappy Do" and Uncle Scuzzy or whatever, it became terrible.
The first cartoon I can ever remember watching was Underdog, so it holds a special place in my heart. As does Hong Kong Phooey.
Later, as an adult, I appreciated the genius that is Rocky and Bullwinkle. 80% of the humor only makes sense from an adult perspective. Kids won't get most of it.