The Godfather Trilogy( 2 my fav )
Starship Troopers
Aliens
Enter the dragon

there are more and the ones listed arnt in any order

Go
The Shawshank Redemption
Critters
The Goonies
The Burbs
The Labyrinth
Flight Of The Navigator

I like my klassics

Fistful of Dollars
For a Few Dollars More
The Good The Bad The Ugly

Back to the Future troligy (first one is the most awsome)
Predator
Demolition man
Final Fantasy Advent Children
Waynes World 1 and 2
Bill and Ted 1 and 2
The Alien films are all good.

I really love the Pirates of the Caribbean films...I can't decide between the 2nd and 3rd one for which one's the best.
My other faves are:

One Flew Over the Cuckoos Nest
City of God
Karate Kid
Nightmare Before Xmas
Love Actually
The Bridget Jones films
The Sixth Sense
Beauty and the Beast
Basil the Great Mouse Detective

and lots of Jim Carrey films haha!