For a while I've been playing hit and miss with shows I watched as a kid. Seeing what I still found entertaining, and what managed to violate my memories of it from being a child. It's been rather amusing, and occasionally dissapointing, but always interesting. Given I doubt I'm alone in doing this I figured a thread on it might save other people some pain, or direct them to some of the better lasting material.
The two I have been oddly happy with are the Batman animated series, and The Munsters(which I watched on reruns as a kid, but hey).
That old batman series holds up as well, if not reasonably better than some of the comics and if you compare it to the old movies it's down right mature art. There's a full collection out there that has an art book and some other random additions, it was quite worth it to me.
The Munsters was a sheer impulse, found it for next to nothing and figured it'd be worth about as much, but for a sitcom from well before I was born it's pretty amusing. It's not nearly as forced as most sitcoms, has good acting and a special effects team who must have had a blast working on it. It certainly beats ancient aliens for something to watch with dinner.
That said, there's always a counter point to these things. If you remember liking the early 90s teenage mutant ninja turtles series, do not go back and watch any of it now. Don't do it. And I figured I'd check out the Adams Family if I liked the Munsters, all I can say is I'm in awe of how much better the animated series and movies where than the old sitcom. I'll have to track down some of the later episodes to see if it improved, but I was not impressed with the early episodes.