Can't Pick Just One From All Triology That's Imposible But Here Are My Favourite Scenes From Each Movie (This Was Very Tough Too):

The Godfather:
The Bonasera Meeting Definatley.

The Godfather Part II:
Young Vito And The Ol' Gang While He Tells Them I Make An Offer He Don't Refuse With That Cool Brando Voice.

The Godfather Part III:
JUST WHEN I THOUGHT I WAS OUT , THEY PULL ME BACK IN (just like my signature heheh) And The Whole Scene The Stroke And FREDO FREDO!