"Whatsoever your hand finds to do, do it with all your might." (Eccl. 9:10)
Hi, I'm just popping in to encourage you to have your protagonist pursue his goals wholeheartedly.
Does he want to be the hero? Let him fight for that right with all of his might. Let him attack his enemies head-on.
Does he want to avoid being the hero? Let him put everything he has toward getting away from that position. Let him run from it with determination.
While it is possible to have your main character drift through life with no clear goals and caring about nothing, it is hard to have a dynamic book with such a character. It is much easier if, regardless of personality or goals, your character pursues his goals as strongly as he can.