@SandboxGeneral: Casablanca is almost flawless, cinematic perfection, but I loved - nay, thrilled to - The Maltese Falcon - which I first saw as an undergrad in the 80s - that is a dark, clever, sharp, cynical, world-weary movie, just brilliant - again, what a cast - and what wonderfully breathtaking cinematography.
I cannot recommend these movies highly enough - sheer class and a stunning example of using motion pictures to tell a story.
The Third Man - sheer excellence; Sunset Boulevard, likewise. These are movies about morally murky worlds depicted with insight and intelligence which do not patronise the audience.
If you have a good story to tell, one crammed with unforgettable characters, and played by a seriously good cast, along with a good script - costume and lighting will do the rest - you don't need violence, sensation, or CGI in a movie.