5. 'The Matrix'
Before The Matrix hit theaters, everyone knew Keanu Reeves as the guy from Speed and Bill and Ted's Excellent Adventure. If they knew the The Wachowskis at all, it was from their 1996 lesbian heist movie Bound. But after The Matrix came all three of them discovered it would define their careers forever. The story of a computer programmer who discovers that his whole world is a shared illusion became a cultural phenomenon in 1999. People saw it over and over, flooding early message boards and AOL chat rooms with their theories. The sequels were four long years away, and let's just say neither of those received many votes in this poll.