My Criterions are as follows (all blu-ray, no DVDs):

The Beatles: A Hard Day’s Night
Midnight Cowboy
Bowling for Columbine
Ikiru
Ivan’s Childhood
Solaris
Stalker
Punch-Drunk Love
Gimme Shelter
Kes
Sid & Nancy
Bob Dylan: Don’t Look Back
Monterrey Pop Festival
Fanny & Alexander
Lord of the Flies
Election
Night of the Living Dead
Rosemary’s Baby
Dazed and Confused
The Great Dictator
The Graduate
Che
The Breakfast Club
The 400 Blows
Dr. Strangelove
Silence of the Lambs

That’s a couple years worth of getting one each month, sometimes two.