Hints - Applejack's Game

Click hints to reveal.

Hint to start puzzle: To solve this, you'll need both everypony's rule and the missing cards. For the rule, make sure to read each judge's justification. For the missing cards, you'll want to group the red cards into 5 categories that can be described by the 5 green cards.
Hint for extraction: Applejack's game is sure similar to Apples to Apples. What's your favorite apple? Mine's Granny Smith, but that doesn't appear in this puzzle.