Not sure if it is relevant, but I have played with a few people who instinctively play in a way that reveals their character’s internal states verbally. My eldest daughter plays this way, for example; its very important to her that the other players not only see what her character is doing, but that we also understand the characters motivations, emotions, and thought processes that are prompting the action. So she will explain them to the other players. An example bit of play: “I am really angry about this, but I don’t want the others in the group to see that anger, especially Bob over there. So instead of showing my anger, I look cool as a cucumber, but all the while raging inside.”

I almost never do that. My character is what she does and says out loud in the fiction. When she is emotional, I only describe it in terms of what can be seen from the outside or I physically embody the internal struggle in some fashion (tone of voice, body language, etc.).