You mention a lot of 1970's films, and I freely admit I have love/hate with that decade. Not a popular opinion here.
Too many films feel far too cynical, angry, even nihilistic. That isn't to say they're bad films, but movies like Looking For Mr. Goodbar, Midnight Express, One Flew Over The Cuckoo's Nest, Apocalypse Now, Eraserhead, Taxi Driver, I know that they're great - I'm glad I watched them once - but I will never watch them again.
I'm a weird old fuck about depressing films. Ever heard of "Come and See"? It's an important film, but I will never, ever watch that. Or "A Serbian Film".
EDIT: et tu,
@Ned Flanders ?