Interesting idea. This can go a million different ways!
I'll start with my current M3 CS:
M3 CS by
JMG, on Flickr
Star-Lord - Kind of a loudmouth, pushing pudgy (Infinity War). He likes to come off as confident, but knows he has limitations. Fks up every once and awhile (needs more rear end grip, lets Thanos snap his fingers), but ultimately does end up saving the world/galaxy.