I still like Duck Tales reasonably well, and Rescue Rangers. I think that I'd still like Darkwing Duck too, but I haven't looked up any episodes to try that theory.
I guess my feelings aren't restricted to the cartoons. I got a box set of season 1 of 3rd Rock From the Sun, and I found it really dull. Same for Newsradio. Maybe it's just because I'd already seen all the later episodes and so the character sets they were just trying to create in season 1 were already full established in my brain and so the introductory phase seemed boring? Or maybe I just don't like older sitcoms? Not sure. As opposed to, say, Malcolm in the Middle, which is still funny to me.
Maybe it's just differences in the stages of TV show development. It seemed like in the 80s, every sitcom had catchphrases which were absolutely vital to enjoying the show. "Did Steve Urkel just say "Did I do that?" after predictably breaking something with his clumsiness? Ha! It is to laugh!" I liked Family Matters when I was a kid, but looking back I don't understand why my younger self enjoyed it. I guess it was kind of like a game, waiting for the inevitable to come, it's all about the anticipation and fulfillment of that anticipation, I guess...