I'm a fan of Criterion releases.
I have a few. Not as many as I would like.
I have:
Ingmar Berman: Four Masterworks - Smiles of a Summer Night, The Seventh Seal, Wild Strawberries, The Virgin Spring
Brazil
Pandora's Box
The Phantom Carriage
Carnival of Souls
Beauty and the Beast directed by Jean Cocteau
Night and Fog
Metropolitan directed by Whit Stillman
Barcelona directed by Whit Stillman
The Last Days of Disco directed by Whit Stillman
There are so many more I wish I had. Like the films of Akira Kurosawa. Ingmar Bergman's Cinema (30 disc set), so many more...