The Last Picture Show. It is Peter Bogdanovich's greatest film, and probably always will be. The comparisons with Welles' magnum opus Citizen Kane are both ironic and justified.
Bogdanovich tells the story of a conversation he had one time with Welles, where the great director was rhapsodizing over the late Greta Garbo, of whom he was a tremendous fan. Bogdanovich remarked, "You know, I agree with you, but isn't it too bad that she only made two really, really good pictures?" And Welles looked at Bogdanovich for a long time, finally replying, "Well, you only need one."