The Godfather (Part 1)
The is the best movie ever made!
This epic movie gets everything right, from powerful performances (from Marlon Brando, Al Pacino, James Caan, Robert Duvall etc) - brilliant script - redolent set design - wonderful direction - the theme!
All this from a movie that resonates around a Family/Loyalty/Mafia theme. And for a gangster movie, it sets itself apart by telling the story from an Insider's perspective of the Mafia without scenes depicting the nature of their businesses -- Gambling, prostitution and other forms of racketeering.
A great movie!
NB - Don Vito Corleone: "I'm gonna make him an offer he can't refuse" - this is one of the most memorable line ever!