i'd say he tried to be a person who is on the run and helplessly in love and has to struggle with his alter ego....
but not even the scene in the factory where he wears glasses helped to make him look like a scientist or something alike....
and the fact that the hulk didnt looked like norton made it look like there where two protagonists...
this was solved better in angs hulk....
especially because of the trasnformation scenes and the fact that he resembled bana (banner) which wasnt sufficient in the one scene with norton...
i really look forward to see the new hulk ...just that one shot of him catching ironman shows so much more expression... just like someone who is a transformed person more than any other incarnation t'ill now....
by the way i get a hunchback of notredame vibe when looking at the new hulk...and i think thats a good thing