The War was over. The only survivors were street animals. From them, a new race of mutants evolved. That was a long time ago. I'd like to think that I've seen everything, that I'm a movie master, but let's be honest.
Nobody can see every movie ever made.
I think the closest a person can come is to work in a video store or review movies for a living. To that end, I rely on my friends to have good taste too. That way, I can use them to guide me to movies that I'll probably like, but have never seen before. There is occasionally a downside to friends recommending hidden cinematic treasure. It's hard to find.