Well I've now seen X3 and, like many others it seems, I was distinctly underwhelmed. I mean, it's a fun old romp and the effects weren't bad, but there was something missing (aside from Nightcrawler) ... and I think that thing was depth. It seemed as though the human moments between the characters were shuffled off to one side as soon as they'd started in order to make room for more special effects. This was especially apparent in the Jean/Phoenix scenes where poor old Famke seemed to be there purely so that the CGI artsist would have something pretty to work on and around; the actual emotional conflict was never given the space it needed to make for a satisfying story.
I think it was telling that, upon leaving the cinema, none of us talked about the film at all ... instead talking about other topics.