^I found WatXM to be better than I remembered, though it was sometimes more a Wolverine series than an X-Men series (while maintaining a pretty good balance of both overall). Also, I'd say Steve Blum is the second-best of the three Wolverine portrayers (I think Scott McNeill is a very good voice actor, but his Wolverine on XME was a little too mellow and relaxed, which is surprising since I know he's capable of playing really fierce and angry characters like Dinobot on Transformers: Beast Wars
), though the original series's Cathal J. Dodd will always be the definitive Wolverine for me.
I think WatXM had the best Nightcrawler and a better Kitty than XME (perhaps less distinctive, but less annoying too). But it had the weakest Xavier actor.