@firefly,
I have to confess I found Monster to be pretty corny.
Basic premise:
Make a character who's had a horrible life, make that character become a monster.
It certainly happens, but I don't think they made it all that believable. For the most part I think they just assumed the audience would follow because they assumed everybody believed so firmly in the basic premise. Honestly you got to give me more than that trite psychological banter to get me to believe a character.