In no particular order:

Pulp Fiction
Reservoir Dogs
Training Day
From Dusk Till Dawn
Saw (say what you want about the series as a whole but the first one is fucking brilliant)
Love Exposure (Weird ass Japanese film)
The Dark Knight Rises (unpopular opinion but Tom Hardy's Bane > Heath Ledger's Joker)
12 Angry Men
Crash (constantly described as the worst film to ever win the best picture oscar. I however think it's an incredible movie.)
Shawshank Redemption

Honorable Mentions:
Green Mile
Reign Over Me
Inglorious Basterds