I didnt like a lot of the violence scenes in GodFather III. It was like style over substance.

The helicopter attack, Vincent overpowering the 2 would be assasins, the end scene at the opera house when the twin bodyguards were killed !! Geez

In contrast the violence in I and II looked natural and realistic, no flashy goings on, just head over there with your weapons and kill the guy. Thats maybe how it happens in real life (not that I'd know thank goodness) and therefore what entertains me.