The usual lists of great Film Noir contain the well known movies Out of the Past, The Big Sleep, Laura, and The Asphalt Jungle. I don't agree that all of those are the better ones, though I will undoubtedly add a few of them to a few more lists later on. These six reasons should not be considered the only six reasons I love Film Noir. There are plenty more where this list came from.
(You can click on the titles to see more about these movies at wikipedia.org.)
1. Pushover (1954)