All the complexities and problems of Scott Summers is what makes him so interesting a character to me.
Leader of the X-Men, but also hated by those X-Men. Struggles with control over what is seemingly a simple power. His last relationship was with... a former bitter enemy.
His problems and limitations make him to me a more interesting a character as the leader than, say, Professor X, Jean Grey, Storm, Wolverine, etc. And it gives reason to, root for the character, to hope he does well.
Just my thoughts