This article is from the LA Times, August 31, 2008. I know, it is a bit dated now, but I am just catching up after being away for so long!
Their #1 film is L.A. Confidential:
http://www.latimes.com/entertainment/news/movies/la-ca-25filmsintro31-2008aug31,0,595627.story
From the list, my favorites are Chinatown, Crash, Clueless, The Big Lebowski…