I have so many but my all time favorite is The Dark Knight. No other film is as brilliantly made and flawless. Other runner ups, and mostly for personal reasons is Fight Club, Donnie Darko, Requiem for a Dream, Eternal Sunshine of the Spotless Mind, V for Vendetta, Big Fish, and Batman Returns. Then there is my lower tier of films I really get a kick out of, but that list can go on and on.