At the moment some of my favorites from when I was younger are those that I mentioned. I used to love Transformers, but I can't remember watching it much. Teenage Mutant Ninja Turtles, obviously. Pirates of Dark Water was a good one, imo. He-Man was another major one, but I haven't watched it in decades. As mentioned earlier I want to revisit the Ghostbusters series. I watched the Back to the Future cartoons, but I don't recall them having quite the impact of the movies or other cartoons I listed. I have a hard time remembering a lot of the 80s and 90s cartoons. I have watched a couple compilations of opening theme songs on YouTube.
*Consulting a list* Scooby Doo is ok in most of it's iterations. It was playing while I was working on something the other day and there was this goth girl band playing. I later found out they are in a few episodes and movies, so I might try to track those down. While on the topic of music, Alvin and the Chipmunks from that era was something I watched often. I guess I like cat cartoons because I watched both Garfield and Heathcliff. Beetlejuice (maybe I like cartoon goth chicks). Fat Albert. Fraggle Rock (both versions) and Muppet Babies. I am pretty sure I liked G.I. Joe, but I don't remember watching it much. Mr. T. My Little Pony, Care Bears, Rainbow Brite. I will finish up the 80s and add some 90s cartoons later.
Some Disney stuff was good: Duck Tales (and the games!), Tale Spin. Some of the others had some good story arcs or episodes, but I wasn't super into like Aladdin (the series) and Rescue Rangers. I think my absolute favorite Disney cartoon series is Gargoyles. Oh, almost forgot Gummi Bears, another of the greats. Maybe others.
Some modern youth oriented ones I like are Regular Show, The Amazing World of Gumball and Steven Universe. Tron: Uprising was good, and I feel they should have made more episodes...oops, I seem to have wandered back into Disney.