Pretty hard. There are movies, i can watch over and over and some others, i don't want to watch again, but still think they are pretty good.

1. Heat
2. Pulp Fiction
3. Fight Club
4. American Beauty
5. The usual suspects
6. Taxi Driver
7. American Psycho
8. Full Metal Jacket
9. Alien 2
10. Kingpin

Heat at number 1 huh? Interesting.

1. Ocean's 11 (2001)
2. Snatch
3. Gladiator
4. Man on Fire (2004)
5. The Last Samurai
6. The Cable Guy
7. Alien
8. The Empire Strikes Back
9. Donnie Darko
10. A Beautiful Mind

I'll be leaving out 1000"s than i'll look at my list a day later and say to myself wtf was I thinking that movie wasn't good enough to make a top ten and eventually I will have to sit back and reevaluate my life choices due to this top ten list it's a daunting task.

Just do it

I already want to change mine

True Romance
The Godfather
Ip Man
The Departed
Tombstone
The Usual Suspects
Donnie Darko
Casino Royale
Goodfellas
Pulp Fiction

In no particular order. Not really an accurate list as this is impossible for me to narrow things down to just ten movies, whatever though.

Night On Earth
Seven Samurai
Oldboy
The Empire Strikes Back
Stalker
Starship Troopers
Wild Strawberries
The Fall (2006)
Dr. Strangelove
12 Angry Men


honorable mentions:
Sunshine, Requiem for a dream, Man bites Dog, Clockwork Orange, Down by Law, Barfly, Samsara, Harakiri, Throne of Blood, One flew over the cuckoo's nest, pulp fiction, big lebowski, taxi driver, spirited away, city of god, lilja 4 ever, boogie nights, alien, fargo

I think it would be more accurate if I started a list, and added as I go, rather than jot down 10 and regret some later.

The Prestige
Goodfellas
Shawshank


No particular order, will add the other 7 eventually

No particular order:

Brick
Black Death
Dark Knight
The Departed
Memento
The Man From Nowhere
13 Assassins
Sunshine
Kung Fu Hustle
Identity

Irreversible
Tetsuo: The Iron Man
Pi
La Haine
Funny Games
Alien
Sonatine
Yojimbo
C'est Arrivé Pres De Chez Vous
Reservoir Dogs



List liable to change.