First, though, as I said, there are two that I think are "great" productions, "Doomsday" doesn't live up to the comics, but it has a better feel for it's content then any of the Superman films (IMHO).
I mean, I'm sorry, but SupermanII (non-Donner) was an almost Don-Knotts adventure. Superman III/IV.. do I need to discuss Richard Pryor and a killer computer? Etc.
"Batman Mask of the Phantasm" was the perfect comic book to film adaptation. It got it on every level. "Doomsday" wasn't as good as the comics, but maintained a heirarchy you could follow with characters that were more complex, bitter and when needed truly evil in comparison to any of the live action films.
Sometimes we think because something has adult situations, like an abandoned kid or whatever, that it makes it a more adult film. That's not true at all. What helps make a film more complex is when the characters themselves have deeper motives and where they are more then two dimensional sounding boards.
Just me though. Yes, Doomsday wasn't as good as it could have been, but it's still better per content then almost anything in the live action versions.