I don't like actually "ranking" movies since my opinions change constantly due to mood, etc.

However, in no order, here is my top 15:

THE RIGHT STUFF
SCARFACE
FULL METAL JACKET
RONIN
BIG TROUBLE IN LITTLE CHINA
SEVEN SAMURAI
RAIDERS OF THE LOST ARK
THE SHAWSHANK REDEMPTION
PULP FICTION
TRUE ROMANCE
THE THING
VIDEODROME
STAR WARS("A New Hope")
CONAN THE BARBARIAN
THE GODFATHER & THE GODFATHER PART TWO