Huge fan of Goodfellas! Casino and Godfather are close seconds.I'm also a fan of the show Sons of Anarchy, which is a biker gang show, not a mafia show.
I'm telling my age again but I enjoy any of the old movies with Edwin G. Robinson. To me, he was the ultimate gangster.
What is your favorite gangster movie? I like so many of them,but I would have to go with GoodFellas.