Re: Which X-Man has received the least development in the films?
Colossus definitely. He's just been walk around in the background, ocassional say something, throw Wolverine guy so far.
Second place, is Scott, but at least with Scott, they showed him to a be a great leader in X-Men, then showed his love for Jean in X2: X-Men United, then he became emotionally distraught over her death in X-Men: The Last Stand. Believe it or not, people, his character has actually had development. Might not be the development you all wanted but yep, development.