Well THats tough but,

GFI- When Carlo gets killed and Michael walks away with Tom and Al Neri. Great and Powerful scene! grin

GFII-probably the end with the flashback

GFIII- The end on the steps is so hard to watch because Pacino and Dianne Keaton are just so good


..Only dont tell me your innocent because it insults my intelligence and it makes me very angry...
-Michael Corleone
"..it was a murder but not a crime"