20s - I've seen Nosferatu once, and seeing as that's the only 20's film I remember seeing, that'll be my choice.

30s - The Wizard of Oz

40s - Citizen Kane

50s - On the Waterfront (quickly becoming my favorite film of all time)

60s - Easy Rider

70s The Godfather (no brainer), closely followed by Taxi Driver

80s - Raging Bull

90s - Goodfellas, closely followed by Fight Club

00s - so far, The Passion of the Christ

"Growing up my dad was like 'You have a great last name, Galifianakis. Galifianakis...begins with a gal...and ends with a kiss...' I'm like that's great dad, can we get it changed to 'Galifianafuck' please?" -- Zach Galifianakis