I'm cross with personality sections, in part because of things like that. It sticks you with a very set boundary for a character you've yet to use or flesh out. I don't think Tolkien took to a diary and wrote out a couple paragraphs detailing how his major characters would react to specific scenarios. I don't even see why other people need to be told, word for word, how my character is supposed to behave. Observe their actions through the IC and make your own conclusions.