My all time favourtie movie:

Amelie

Then, in no particular order:

Lord of the Rings (alltough sometimes I wish it was never made.. I would love to read the book again without imagining Orlando Bloom as Legolas..)
Pulp Fiction
Memento
Requim for a dream
American Beaty
Usual Suspects
Simon (dutch movie, very, very good)
Koyaanisqatsi Koyaanisqatsi (1982)
Donnie Darko

Cool thread, hopefully i'll find some movies i've never heard of in it. Always nice to watch.