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.
Following the XKCD rules and keeping it in the 2000s and later makes it a lot harder. I could make an entire list of '90s movies that qualify.
But my answer is: Pitch Black.
Bonus answer, which doesn’t quite qualify because it has an exact 60% rating: Love (2011, the space one)
Wow, Pitch Black is rated that low? I really enjoyed it!
59%, just barely squeaking in.