When I was a young guy I saw THE ROAD WARRIOR multiple times in the theater. It was always an adventure leaving the theater parking lot after a midnight showing of that film. Everyone thought they were Mad Max.
There are a lot of great mentions in this thread, but I agree with THE GODFATHER as best film. GOODFELLAS was great, too. Mob movies are like pizza…..there is only GOOD BETTER and BEST. I saw a good foreign flick a few years ago called MEMORY OF A KILLER. It was about an aging hit man who is doing one last contract while struggling with Alzheimer’s disease and short term memory loss. Definitely worth watching.