These are my favorite movies. All of them touched me in one way or another, and I certainly recommend to see them, if you haven't seen them yet. Don't ask me why I ranked "Mulholland Dr." as #1 - i just feel like it :)
Mulholland Dr.
Fight Club
Lost in translation
The insider
Amelie
Kill bill (vol. 1 and 2)
Memento
Confessions of a dangerous mind
Oldboy
Snatch
Wallace & Gromit: The Curse of the Were-Rabbit
Tim Burton's Corpse Bride
Magnolia
Donnie Darko
Sling blade
Life of David Gale
Matrix
Spy game
Seven
American beauty
Traffic
Shrek
Finding nemo
Crash
Three kings
Gladiator
Saving Private Ryan
Spirited Away
Being John Malkovich
The game
No man's land
The Girl on the Bridge
Forrest Gump
The Truman Show
Man who wasn't there
A Simple Plan
The sixth sense
Road to Perdition
Apocalypse Now Redux
The groundhog day
K-Pax
Dead man
Man on the moon
Twelve monkeys
Adaptation
Hero (Ying xiong)
Narc
House of sand and fog
Vidocq
Panic room
The city of lost children
Eternal Sunshine Of The Spotless Mind
Nell
Bowling for columbine
Delicatessen
Levity
Run Lola Run
War photographer (documentary)
Sin city
March of the Penguins
Millions
2046