Any point in history and genre.
For me, it’s Stalker by Tarkovsky. I hadn’t seen it before, so I watched it twice. Once on YouTube and then again with the nicest file I could find. I loved it so much. Solaris is the only other one of his I’ve watched, so I’ve got all of them downloaded and ready to watch now. (thank our lord, rutracker)
I had the same experience with A Real Pain. I was like “ehhh an indie dramedy directed by a famous actor? sure I guess I’ll put it on” and was kinda blown away by it.