Burton's Batman was good, but more about his now-stale aesthetic and Jack Nicholson's Joker than anything else. Returns had too many villains and seemed to be an exercise in exactly how much self-conscious 'darkness' an audience could take. In this sense, it's probably the perfect 90's comic book movie, but it's little else really.
I'm not a fan, but there ARE great Burton films. Ed Wood is probably the gold standard, but Big Fish is also great and Beetlejuice is just pure fun.