Let's take a game with great rules that pretty much everyone loves, like Twilight Zone or Addams Family. Then take a game that everyone loathes, like Raven or Thunderbirds, especially something with poor gameplay. Now re-theme the good game so it has the poor game's artwork, music, callouts, etc., but still the exact same rules and gameplay. Then do the same thing to the poor game with the good game's aesthetics, leaving rules and gameplay alone. How much less do you enjoy the better playing game with the new awful theme? How much more do you enjoy the poor-playing game with the great theme?