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.
Was looking for Iron Sky! I found it one day when we were trying to have drunk b-movie night but it turned out to be way too good. Perfectly shot, great satire/absurdist humor and a likable cast. One of my faves.