My answers...

GoodFellas(although The Godfather is a better film, I like GoodFellas a LITTLE bit better)
Casino
Donnie Brasco
Scarface
Raging Bull/True Romance
Pulp Fiction/Reservoir Dogs(two of my all time favorite movies by my all time favorite director)
Heat
Scarface
Gangs Of New York
Grand Theft Auto III
Driver I/II and Mafia
Tom Hanks in Road To Perdition
Daniel Day-Lewis in Gangs Of New York
Al Pacino
The Shield
One and Three
Kangaroo Jack

A "Best of Quentin Taratino" question with a "Best of Martin Scorsese" question?

the power of accurate observation is commonly called cynicism by those who have not got it. george bernard shaw