I haven't seen a ton of mobster flicks, but this is pretty much The Godfather but better in many ways. The corruption and transformation of Henry Hill is staggering.
I'm a big fan of Martin Scorsese soundtracks. He uses popular music, but he is one of a few directors that seem to put a lot of thought into song choices. (Wes Anderson and Quentin Tarantino also stand out.) It's great how sometimes the songs complement the action and sometimes they are the perfect counterpoint.
Goodfellas (1990)
