>>86560163many things.
for example, giving a big sword and slowly learn how to use it would be a start.
leveling up and gaining experience from many things, going from slaying monster to help some old lady to cross the street.
make him explore and visit places and marvel at the beauty and differences of those places.
make him have defects that he will overcome as he get more experience and experience different things, a perfect example on learning how to fish and develop his patience or simply learn to find beauty in the sunsets.
making him learn different things like jack did from the past to the distant future.
basically, it will be really interesting to see him develop as a person thanks to seeing many different places, meeting all kind of people, learning many things on the road, etc...
I would really like to feel him more human by getting silent sometimes and just look, be it by being perplexed or simply looking some beautiful scenario.