Some personal favorites include:
1) Most all films by Ingmar Bergman (Sweden) including Seventh Seal, Wild Strawberries, Through a Glass Darkly, Winter Light, Persona, Hour of the Wolf, The Magician.
2) Most all films by Akira Kurosawa (Japan) including Seven Samurai, Ikiru, Rashomon, Yojimbo, The Hidden Fortress, High and Low and many many others.
3) Robert Bresson (France) A Man Escaped, Pickpocket.
4) Many films by Luis Bunuel (Spain) including Phantom of Liberty, Discreet Charm of the Bourgeoisie, Belle de Jour, Simon of the Desert, El This Strange Desire, Exterminating Angel
There is a very thin line between "hobby" and "mental illness". - Dave Barry