As I've recently become a Gundam fan, and also recently saw NGE for the first time (wouldn't consider myself a fan of that), I thought of this topic.
Kamille and Shinji both share a rather bad childhood. It's just that they react to it in completely the opposite way while also going to the extreme end of that reaction. Shinji became passive, unassertive and more afraid of himself than anything else. He didn't want to go forward but he also didn't want to go back. He was pressed into harsh situation after harsh situation and all the time he was reluctant and unsure of everything, most of all himself.
Kamille though? His feelings of helplessness only made him more aggressive. His bad parents only made him explosively rebellious. When given the chance to have power and control, he does not hesitate like Shinji did. He wants to feel like HE'S the one with the power now so he never has to experience the old feelings of powerlessness.
Point is, I think NGE be a more interesting show with Kamille as Gendo's and Yui's son having to pilot Unit 01. How do you all think things change?