Top 10 movies from 1975:

Akiro Kurosawa's Dersu Uzala
Terry Gilliam's Monty Python and the Holy Grail
Steven Spielberg's Jaws
Woody Allen's Love and Death
John Huston's The Man Who Would Be King
Robert Altman's Nashville
Peter Weir's Picnic At Hanging Rock
Norman Jewison's Rollerball
Sidney Lumet's Dog Day Afternoon
Milos Forman's One Flew Over the Cuckoo's Nest

And some runners up:
Clint Eastwood's The Eiger Sanction
Francois Truffaut's History of Adele H
Sidney Pollack's 3 Days of the Condor