These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Apples To Apples
Game Breaker: Every group has its own unique sense of humor. Somewhere in that massive pile of red cards, there is a noun which plays perfectly to your group, and will win every hand it is played in, without fail. (It's frequently Helen Keller.) This is self-reinforcing if your group finds the idea of an instant-win card humorous as well.