i watched Stalker recently and was a little disappointed. it's good, but i think i was too hyped for it, and i definitely prefer Tarkovsky's
Solyaris.
lots of good recommendations here, so i'll just add a couple of post-apocalyptic movies (both from 1975 coincidentally).
A Boy and His Dog:
Fun, weird post-apocalyptic movie about a young Don Johnson and his telepathic dog. Gets real strange in the third act, but it has one of my favorite final moments in film history.
The Noah:
Also weird post-apocalyptic "last man on earth" movie. Great performance by Robert Strauss in his final film as he tries to grapple with his solitude. Also has a wild, disorientating third act (which actually reminds me a bit of mother! now that I think about it). The full movie is also
available on YouTube.