Moody:
If you want to vote for technical all silent films are probably off the list even Metropolis (does anyone know Metropolis?)
Yes, "Metropolis" was directed by Fritz Lang, who was married to Thea von Harbou, the author of the novel of the same name which the film was based upon. (It was a pretty accurate adaptation, as I recall.)
Other motion pictures thus far not mentioned, which I would rate highly are "The Prime of Miss Jean Brodie," "Doctor Zhivago," "Fargo," "Diner," "Amadeus," "Blade Runner," "Judgement at Nuremberg," "One Flew Over the Cuckoo's Nest," "Back to the Future" and "The Bridge on the River Kwai."
I'm fond of the classics... --C.K.