That would Grave of the Fireflies.
Its hard to choose just one, but seeing as this anime movie moved me to pieces and I've yet to watch it twice because its so emotional for me (and thats a first!), is has to be the one.
That's too tough to call so I'll just list the ones I never tire of no matter how many times I see it. Pulp fiction, dawn of the dead(newest one), cruel intentions, labrinth, and gone with the wind just to name a few :)
oh God! greatest movie all time . . . hmmmmmmm
best actor is easy Edward Norton his in too god in too many good movies to be behind anyone else.
movie has to be Return of the King I can find fault somewhere with
Fight Club: they don't tell me exactly how to make the homemade explosives
Donnie Darko: empathy becomes challenging at some points Donnie gets just a little too crazy
The Godfather (just): the choreography in the one real fight scene
Pulp Fiction: OD+adrenaline=fine??? is not the case
Lost & Delirious: takes to long to go from good to mind blowingly good
Battle Royale (Batoru Rowaiaru): the opening minutes trying too explain away the situation get to the school children killing one another
bear in mind these movies don't make them bad poor or even average, in many cases their what gives these movies their charm but in comparison to Return of the King these flaws expose htemselves a faults and Return of the King just nudges ahead
Oh man this is hard. If I have to pick the "One Movie" I think I'd have to go with Fincher's cult hit Fight Club. I can watch it over and over again without ever getting tired.
Classic Film: Gone With the Wind. No matter how many times I watch this, it still takes my breath away.
Horror Film: The Shining. Nothing scares the hell out of me that Jack Nicholson.
Romantic Comedy: Maid in Manhattan. Seeing Ralph Fiennes play a dashing, debonaire senatorial candidate falling head over heels in love with a hotel maid is too romantic. Got to love those funny sidekicks.