I don't know if people are aware, but there is a fantastic film website called Imdb, which gives you details of every movie ever made, and every actor who's appeared, with links to everything else you might want to know about them.
People around the vote cast votes for all films, and you might be interested in the Top 250.
http://www.imdb.com/chart/top
How many of the top 250 have people seen?
Didn't notice Top Gun amongst them
