Over the past few days I've watched a couple of films from this thread to start playing catch-up and it's paid off very well so far.
A Separation was one that's long eluded me, even though I knew it was universally praised. Somehow I had thought it was essentially an Iranian Scenes from a Marriage. I was very happy to find that it was much more than that. But damn, the real surprise was Green Room, maybe because I had more modest expectations. It's not easy to make a film feel dangerous and tense for nearly 90 straight minutes, but this one had me gripped. I thought no way would it stick the ending, but the ending was fantastic! Really surprised at how effective it was.
I'm going to try to keep dialing up films from your lists. I'll try to hit at least one new film from everyone.