Se7en (1995)
I thoroughly enjoy Fincher's entire catalogue. I like all his stuff; hell, I like Panic Room, and even had a good time watching Alien 3. I love watching Fight Club as much as everyone else. I've enjoyed seeing his style change and mature, and I think Zodiac and The Curious Case of Benjamin Button are fantastic entries into a promising future.
But Se7en is his masterpiece.
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