Let's do something different here. If you had to pick one movie from each decade from the 30s on that would be your favorite, which ones would they be? My lists works as 1-10, so it would be 31-40, 41-50, 2001-2010, etc. If you don't have one from an era, then don't worry about it, as I don't expect you to have seen enough movies from every decade to have an absolute favorite from those years.
30s - King Kong
40s - Arsenic and Old Lace
50s - Godzilla/Gojira
60s - From Russia with Love
70s - A Clockwork Orange
80s - The Empire Strikes Back
90s - The Matrix or The Shawshank Redemption
00s - The Dark Knight
Yeah, I know having a tie for the 90s is a cop out, but I cannot choose between the two.