When i was a kid i loved He-Man and the MOTU and Thundercats, though when i rewatched them recently, i don't think they've aged well. I did enjoy the 2002 He-Man series though
From the 90's i loved Batman TAS, the first 2 seasons of Gargoyles and X-Men and still watch them on reruns
I've always felt the 1st and 3rd generations of Robotech are excellent, and the 2nd is barely watchable, except the last few episodes
Gummi Bears was good fun, and i really enjoy the old Warner Brothers cartoons (from maybe the 60's?) which can be pretty violent by today's standards
More recently, I thought Avatar: The Last Airbender was a really good series
Currently, the only cartoon I watch is the Clone Wars, which I only got into because of the legos, and now find to be pretty good