It's interesting to see what each poster here considers to be an "old movie".
My list of movies made in the 20th century that I view repeatedly includes:
- Sunset Boulevard (story, dialogue, GLORIA SWANSON)
- Double Indemnity (Fred MacMurray playing against type, Barbara Stanwyck given floozy clothing and a hilarious wig)
- Blues Brothers (Aretha, Ray Charles, JB, John Lee Hooker...well, you get the picture)
- Anything directed by Kubrick
- Anything directed by David Lynch, especially Blue Velvet (Laura Dern's best performance ever)
- Anything directed by Tarantino, especially Pulp Fiction (dialogue, Maria de Medeiros crying over pancakes)
- Philip Kaufman: The Right Stuff, Unbearable Lightness of Being (filming Kundera is a feat in itself)
For me, pretty much all of the Powell-Pressberger (The Archers) movies that have Criterion editions are worth watching. You don't have to take my word for it. Scorsese fans take note: Marty provides commentary on pretty much every Archers release for Criterion. And look up Thelma Schoonmaker on IMDB.
Sunset Boulevard is brilliant; not a wasted scene - what a cast, what a story, what an amazing script, and the cinematography is to die for.