Mainly:
Batman (as soon as I saw this, at a young and impressionable age, I decided to be a filmmaker and I never wavered...the other films either heavily inspired me or further bolstered my dreams)
Evil Dead
Memento
Reservoir Dogs
Desperado
LOTR trilogy
Of course, there are plenty of other films (like Star Wars, the Indiana Jones trilogy, Aliens, and on and on...) that are amazing, and have reminded me why I love movies. There's no way I could sit here and list them all.