Producing : Whats Your Favorite movie by Chauncey Chester

Whats your favorite movie of all time and why. The reason I ask is because everyone on this networks was influenced by a movie based on something. As a producer I am always curious to know the sensibilities of my audience and their expectations when watching films. In my opinion they are two audiences the art house film enthusist who watch films with a technical eye(shots, characters, cinematography etc) and most people who just want to be entertained(escape from reality) in story. No group is better than the other because they all represent my audience. With that said whats your favorite movie and why. And what kind of films interest you