What are some must watch movies in your opinion?

I was never the one to watch movies, but now I'm trying to get started in this universe and would like to start with the "more important" ones. I'm doing a list (kinda like Captain America) and here's what I've got so far:

The Matrix

Donnie Darko

Star Wars

Fight Club

Any recommendation is welcome Smile

Definitely public enemies, and the perfect robbery