In addition, I'd argue that most of those really good movies are still more enjoyable to watch without spoilers. They may be good on a re-watch, but not as good

In addition, I'd argue that most of those really good movies are still more enjoyable to watch without spoilers. They may be good on a re-watch, but not as good. I think there are only a handful of exceptions. Ironically, the first exception that comes to my mind is Miyazaki's own My Neighbor Totoro.