For me the 'Genco deathbed' scene. Marvelous. How the man believes Vito can save him from death. It would have been a great asset to the movie for several reasons:

1) The respect people (family of Genco and Genco himself) have towards Vito is shown
2) The power of Vito (Genco believes even 'Dead' is afraid of him)
3) The intelligence of Vito and especially his perspective views on things (saying Genco shouldn't make stupid blasphemy comments and saying he's not that powerfull)

I loved it!