11. Moulin Rouge!
I don't know about you, but some movies serve as a "skeleton key" that unlocks whole genres for me. Moulin Rouge did that for musicals -- it's such a heady, emotionally-breathless film that sweeps you up like a tornado. Baz Luhrmann at his best.
12. Snowpiercer
When @ThePenDrake@twitter.com leaned over to me and said "the train is capitalism" it blew my freaking mind. :O
An incredibly sobering metaphor for the unsustainability of the status quo, and a strong argument for the necessity of derailing it for our long-term survival.