X-Men : The Movie (2000)
Ugh. First time I've seen this movie since... I was like 12. Some parts of this movie are great (the school tour, when Cyclops and Storm save Wolverine and Rogue's asses in the snow, basically all Xavier's scenes with Magneto) but some parts... I can't stand. (Rogue in general, Toad, Senator Kelly's "mutation", the costumes)
It also really bothers me that even with only FIVE X-Men, no one other than Wolverine gets any sort of character development. Or any scenes that matter. This is a common theme of the X-Men movies, which is why I find ultimately find them disappointing.