District 9
Children of Men
District 13
Assault on Precinct 13 (original)
Blood: The Last Vampire (anime original)
Watchmen (if you read the comic or book)
Jackie Brown
La Confidential
Proof Of Life
Run Lola Run
Stand by Me (oldie but goodie, the "Revenge of Lardass Hogan" is one of the funniest things I've ever seen)
Not feature films, but if ye never watched them on TV-
The Wire (all five series!!)
Generation Kill
Avoid Nicholas Cage films. Especially- and I must stress this– ones where he has a moustache.
The only exceptions to the above are Wild At Heart and the National Treasure films.
And finally:
The Big Lebowski 8)