I think Hannibal had a sort of Greek look on war, what i mean by that is... He defeated the Romans in battles, so they should surrender. Greek warfare was very much about single battles and small losses (the notable exception being the Peloponnesian war of course). If two Polis were quarrelling they would march out, a few hundred would die, the loser surrenders and they all go back to the farms. Rome simply wouldnt die, i mean...80 000 odd men lost in a single battle, and not just on one occasion. Thats ridiculous really, and it became part of the Romans reputation in the following centuries, tenacity and perseverance is what it was about to be Roman.