Top 5: best movies ever

Blade Runner
Year: 1982
Director: Ridley Scott
Cast: Harrison Ford, Rutger Hauer, Sean Young, Edward James Olmos, Daryl Hannah

My all-time favourite movie, of course only the director's cut and not the horrible version that was in the cinemas and still is being shown on TV. The director's cut is just dark and impressive and gets support from the fantastic soundtrack by Vangelis, whereas the version that was done for the cinemas (mainly because that stupid test audience in Dallas wanted a hero and a happy end) has an annoying voiceover and an unbelievably cheesy end.
Anyway, it's a great story, based on the Novel "Do Androids Dream Of Electric Sheep" by Philip K. Dick, put on the screen with impressive images by Ridley Scott.
"It's too bad she won't live...but then again: who does?"

Pulp Fiction
Year: 1994
Director: Quentin Tarantino
Cast: John Travolta, Samuel L. Jackson, Uma Thurman, Harvey Keitel, Bruce Willis, Tim Roth, Amanda Plummer, Christopher Walken

This is probably the movie of the 90s and it was seminal in several ways: the protagonists are not the good guys anymore but a bunch of gangsters--the soundtrack (with music that was not written for the movie) is an integral part of the action--there is no happy end, in fact the end is not important at all--there is no obviously good or bad violence: people kill cold bloodedly, get killed, kill by accident, save others from being killed, etc.
I have seen no movie more often than this one...

The Big Lebowski
Year: 1998
Director: Joel Coen
Cast: Jeff Bridges, John Goodman, Steve Buscemi, John Turturro

The Coen Brothers! I don't have to say much about them, they're simply brilliant. Many people liked their academy award winning Fargo better, but in my opinion this movie is the Coen Brothers' masterpiece. Everybody in the movie is going crazy, hunting for something that doesn't exist and acting based upon their rather limited information about what is going on. The actor's are great, the dialogues hilarious (I was very deceived when I saw it in German) and the music fits perfectly.

Invasion Of The Body Snatchers
Year: 1956
Director: Don Siegel
Cast: Kevin McCarty, Dana Wynter, Larry Gates

This is my all-time favourite 50s horror movie. It is mainly seen as an allegory about the McCarthy-era and the communism-phobia--but it is more: it's an intense and thrilling movie about the fear to lose your soul, the fear to lose yourself.
There have been two remakes: Invasion Of The Body Snatchers by Philip Kaufman from 1978 starring Donald Sutherland, Jeff Goldblum and Leonard Nimoy with tuxedo appearances of Don Siegel and Kevin McCarthy. The plot has been changed slightly compared to the original with the most obvious change being that the people that were taken over start screaming when they notice a "normal" person. Whereas the original has a sort of happy open end this version ends with the tragedy, even the protagonist got turned.
The third version is Body Snatchers by Abel Ferrara from 1993. This version is closer to that from 1978 and places the whole plot on a military base. Although it is the weakest of the three versions it is definitely worth watching.

Metropolis
Year: 1927
Director: Fritz Lang
Cast: Alfred Abel, Gustav Fröhlich, Brigitte Helm, Rudolf Klein-Rogge

This is the godmother of all Science Fiction movies. Although (or rather because) it's a mute movie it is much more expressive and fascinating than most movies made today.
If you should happen to have the Giorgio Moroder version just turn off the sound: the music is not only horrible but it just doesn't fit the movie.