From an ongoing discussion with andamaroo, adamgreeney, and _guy_incognito.. I present you, my adoring public, with my official movie scale of all time. It's been doing the job for me for something like 6 or 7 years now, I think.
Top 3: Last Crusade, Big Lebowski, Snatch (these are interchangeable. Others that have been in the Top 3 include Top Gun, Usual Suspects, Empire Before Lucas Biffed It, Mallrats, Matrix, etc)
Every other movie ever made. (this includes all movies that HAVE BEEN but ARE NOT CURRENTLY in the top 3)
The Last Emperor