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.
I watched it in theaters when it came out and really liked it. Interesting slasher movie with good scenes and a good plot. Yes, I wish they would have let Cory keep the spirit of Michael alive, but it is probably better to let the character die in peace.
But then i saw all the Michael Myers fans hating on it afterwards and never understood why. 40% on rotten tomatoes.