This is like asking what is your favorite song, or food. There is so much to choose from. It is all so great.

I enjoy some of the comic scenes, like:

"leave the gun, take the cannoli"

"he made me look ridiculous, and a man in my position can't afford to look risiculous" (he looked pretty ridiculous at the time"

Frankie and the "can of peas."

The landlord groveling in fron of Don Corleone as he keeps lowering the rent.

Vito mocking Johnny Fontaine in the "You can act like a man" scene.

Bridget Fonda sneaking past Abbandondo.

Michael mocking Vincent saying "what you wannt be for me? tough guy?"

And of course the unintentionally funny (and bad) performance by Eli Walllach in GF III.