All of the Margaret Rutherford Miss Marple films, all of the Basil Rathbone Sherlock Holmes films, any of Bette Davis's films (Jezebel in particular), and The Wicked Lady with Margaret Lockwood.
Most David Lynch films. I've watched 'Mulholland Drive' and 'Lost Highway' a lot of times. Also I've watched "If..."+"O' Lucky Man' and 'Britannia Hospital' a lot. I love Malcolm McDowell in those films. I saw Ken Russell's 'Savage Messiah' a while ago and I can see myself watching that a lot too.