Goodfellas is the undisputed classic in my opinion. Growing up in New Jersey watching that movie a million times before the age of 10 is a brith rite lol. I can mouth the entire movie and its just a flawless and timeless cast that perfectly encapsulated the lifestyle.

Godfather Part 1 & 2, followed by Goodfellas and then maybe Casino 

I love the 1930's movies, Scarface 1932 with Paul Muni and Public Enemy 1931 with James Cagney.   I love the pots and the suits that they were wearing.  

I think two favorites for me were Scarface and Goodfellas; it's really hard to beat Goodfellas, probably the reigning champion in terms of mob movies.

Not surprising but Goodfellas was one of my favorites, the Godfather part one is a real close second.

I havent really seen any. I guess Bugsy Malone the musical with the kids? Or I suppose I could say True Romance that Mikey had me watch back in 2005 when I was working at the movie store. 

Miller's Crossing - same here. Totally neglected, possibly in part because it doesn't have that 'blockbuster' element.

AH

My favorite has probably got to be either Donnie Brasco. Another one I like that doesn't always seem to be on people's minds is a Bronx tale that's a pretty great flick in my opinion. 

G

the godfather is probably my favorite. I enjoy Donnie Brasco a lot and Casino too. Good fellas is also pretty good. I think I like he older feel LF Godfather more than the newer movies  

The Godfather is one of the best movie that I watched, but also Goodfellas and the Irishman, I like these movies a lot. They are really great to watch, and enjoy, from the story and acting to everything else up to the cast

I mean honestly the original godfather trilogy will always be my favorites, the games they made too were great. If I had to pick a second one then another classic Scarface would have to be it

My favs are:

godfather

godfather part 2 

scarface

i was never into gangsters that much until i found mafia returns now I'm watching all old mobs movies and really enjoy mob history.

Good Fellas 

Don't ever try to cross a friend especially a best friend, RHM, nor a LHM 

These are my 5 favorurite mob movies

The Godfather
Goodfellas
Casino
The Departed
A Bronx Tale

HBO has/had the "Godfather Epic" which was the extended versions of Godfather 1 & 2 in chronological order. It's like 8 hours long but it was a cool new way to watch. 

Even though it's not a movie, I really enjoyed the sopranos! But i'm bigger on series anyway. If I had to pick a movie I'd probably go for scarface.

I have to agree with JaffaCakes Missus up there. I think the Sopranos series was as good as it gets, although there were parts were it got a bit boring, but you'll have that in any tv series that goes on for several years. I never get sick of watching them, though. There's lots of great mob movies, but I've seen them all so many times that I no longer watch them. Occasionally if Godfather Part One is on, I'll tune in. That one never gets old.

Tough

Godfather 1&2

1. Goodfellas I can watch Goodfellas Sopranos and Legend everyday all day.

Casino

A Bronx Tale

Gotti (1998)

The Departed 

Mafioso (1962)

2. Sopranos

3. Legend

 Kill The Irishman 

Black Mass

Donnie Brasco

i can keep going lol.