Hrmm... mine has to be... either Zell cause he had a hilarious personnality or Master Chief. MC is the BEST. I think he could kick Zells ass, whether Zell used duel or not.
Dart from Legend of Dragoon owns over all of the rest. His family was murder by a black monster so then he goes on a quest for revenge which turns out to bring him back to his father and unravels a mystery about the Dragoon warriors.