Despite being an rpg, the format of my game is similar to a graphic novel, so in my case it is a matter of adding content, the question is how to know at what point content is missing?
Viewing post in How do you improve the rhythm of your games?
Good question.
I'd say that for every serious scene that lasts over a few minutes, there should maybe be a portion of the game where a character tells a funny joke, or the game has a minigame that's based on getting the player to relax (fun card games, etc).
I actually feel a fairly good example of such a design choice in action - would be games like Final Fantasy VII or Mega Man Legends.