Inspired by the linked XKCD. Using 60% instead of 50% because that's an easy filter to apply on rottentomatoes.
I'll go first: I think "Sherlock Holmes: A game of Shadows" was awesome, from the plot to the characters ,and especially how they used screen-play to highlight how Sherlocks head works in these absurd ways.
They're definitely fun "I want an excuse to go to the theater" movies. I remember going to 1 through 4, having a good time, but I don't remember a thing about them. In fact, the best part about the Lindsay Ellis videos was watching reviews and going "Oh wait, yeah that did happen didn't it."