I enjoyed Pacino's metamorphosis over the course of the trilogy. He's so soft spoken at the beginning of The Godfather, turns absolutely cunning and ruthless toward the end of The Godfather, becomes just detestable in The Godfather II, and then tries to redeem himself in The Godfather III.

It's hard to name who the best is. I can say without hesitation that Sofia Coppola was the worst performance out of anyone in the three films.