I share a few common movies with some people several times like Caddyshack, the star war movies and Godfather III. The movie I'm most embarassed to have never seen is Scarface.
Godfather I and II really are great movies, especially the second one.
Shawshank is an incredible movie too. My second favorite of all time (behind American Beauty).
Dark Knight surprises me since it was such a big hit so recently.