ALIEN (1979)

 A movie that works because of its ability to create a feeling of horror and suspense.  It's use of shadows and actually hiding the monster for a large portion of the movie is its strong point.  This movie doesn't appeal to modern assholes because typical asshole movie goers of today can't appreciate anything that doesn't have stupid CGI explosions every minute or so and everything being spelled out for them like the infantile drooling masses that they are.  They've been numbed down by everything that passes for today's entertainment.  Not that there's anything wrong with brainlessness in your eye-candy of choice.  It's just that I find it amazing that people have gotten to the point where this movie is too slow for them.  Of course if this movie is too slow there's no hope they'll ever get through something like 2001: A SPACE ODYSSEY and that's a shame because cinema thrives when it works its magic through use of ideas to convey a story not through looking exactly like every other video game-like movie in the multiplex at the moment.  End of rant.  Greatest monster-in-space movie of all time and H.R. Giger went on to influence pretty much every monster since.