I know they're comic book movies and you're supposed to be wowed by effects more than impressed by the story, but I still can't suspend my belief long enough to just enjoy the movie without picking it apart logistically. For example...
They wanna kill the kid on the island, right? Why take the whole bridge and all the teams of mutants? Magneto could stand on the other side of the bay, raise the bridge and drop it on the building killing everyone. Okay, light it on fire since Pyro[?!?!] is so interesting all of a sudden. They wouldn't be anywhere near that kid, so their power is never in danger. Jean Gray could mentally take control of a guard and have him shoot the little bastard from the next room. Apparently from what we saw, you have to be almost touching him to be affected. There were just so many ways to accomplish the goal without a full blown ridiculous fight.
Sidebar: This movie will never top the logistical nightmare known as "Daredevil". For those who saw it, they'll know what I'm talking about. He's a kid who got acid in his eyes, lost his sight and grows up with "his other senses being heightened". Okay, he has super hearing and a unique sonar-like sense of sight. Why, then, is he able to do a header off a 60 story building, freefall forty stories, land on a window cleaner's scaffolding, do a backflip onto another and land on his feet below? Why at the end in the church is he able to run up to the pipe organ wall and jump 25 feet straight up in the air and scurry up the wall? Apparently, he get's blinded and turns into a grasshopper. Other beef for me was Bullseye backhanding DD's staff with the blunt ends 100 yards like a laser and it goes 8 inches into Elektra's father's chest. His ability is great aim, not having a cannon for an arm. One less obvious detail is when they're fighting at the playground. Ben Affleck and Jennifer Garner both do backflips onto opposite ends of a set of teeter-totters and they're perfectly balanced and parallel to the ground, implying that they would have to weigh exactly the same. Like I said, I notice illogical stuff and wonder why it doesn't get caught sooner in the process.
Sorry, back to X3. Wolverine's claws came out... what? twice? three times? Lame. Colossus was metal for a total of three seconds. We saw more of the porcupine mutant. Mystique was written out too soon and not utilized. Pyro was way too prominent. Jamie Madrox is a good guy in the books I've read, and yes... needs hit to multiply. There was ZERO reason to show Angel, because he did nothing. Juggernaut was disappointing to me. He's always been my favorite, I have a juggernaut tattoo. His look sucked and so did the way he talked. Rogue's super power is apparently to go through three movies and see no action whatsoever. She never once did anything except get kidnapped in the first one. Okay don't do it in the first one, but she eventually end up being tha baddest of them all. Flying, infinite strength, practically invulnerable. She did nothing. Three movies and Iceman never used hs ramp to skate around. He was ice for two seconds. I know production costs keep that stuff to a minimum. But they tried to get too many cameos with no demonstration of abilities
For me, the pleasant surprise of the film was Beast. And I will admit I liked the looks of Pheonix when she was doing her thing. Overall, not a great movie for me, but I'm a forgiving comic fan, so I'll end up with it on DVD anyway.