Se7en
Great, great movie. Wonderful building tension. Well written character arcs. Chilling atmosphere. Overall, I really loved it. Can’t decide if I like this or Fight Club more. This maybe felt more well crafted but the uniqueness of Fight Club maybe takes the cake for me.
EDIT: I also must add that these are some of the most disturbing murders I have ever seen on film and I am not quite sure how I will fall asleep tonight.