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.
This took a few tries, so here is everything I found.
I got Cowboys & Aliens, but technically that doesn't work for the xkcd rules because that movie came out the month before my 18th birthday. Very close though. And I guess it's kind of a case of so bad it's good, for most people, but for me, it's the James Bond / Indiana Jones crossover I always wanted and it's probably the closest thing I'll ever get.
I enjoyed Aladdin (2019), Don't Look Up, and Don't Worry Darling but I wouldn't say they are among my favorite films. They only meet the requirement for reviewer score though. And I think audience score is where it's at for this challenge. Suicide Squad works for this version of the challenge, but not for xkcd on audience score. Anyone can like a film that did poorly with critics.
This is probably going to end poorly for me, but for the rules as written xkcd challenge, I got Pixels. It's an Adam Sandler movie, and I know some people don't like those. I'm not crazy about Adam Sandler films, but this one was about video games and I really enjoyed it. I think Sandler did it justice. His experience with video games seemed to be primarily from arcades, but I think that is a valid perspective.
I watched it with my roommate during college. I guess some people hate it because they feel the original vision wasn't done justice for the short film it was based on. I might have seen some of that original short film, I can't rule that out for certain. But based on the version I found on youtube while writing this I clearly hadn't. The controversy didn't detract from my enjoyment of Pixels.
I've only seen the first like 40 minutes of Cowboys vs Aliens but I remember thinking that it was a surprisingly good movie given how stupid the premise sounds.
The only movie I've seen that get more laughs over the premise during the preview was the GI Joe movie. People were really into it as the trailer played and then the title came up and the whole theater room burst out laughing.
I watched Cowboys Vs Aliens in the cinema and didn't like it. Some years later I checked out the extended cut, and it was by far a better movie suddenly. It should definitely be above 60 percent now.
But that's the bad thing about rotten tomatoes. The first critics dominate for a long time. That especially is the case for TV shows. If the first two episodes are good and the rest is shit it still will be forever stuck at 90 percent.