Bravery to me means being reckless, self sacrificing, and temperamental.
Bravery is a choice because humans have an instinct of self-preservation. Visual cliff experiments prove that we are born with it. I do not consider myself brave and I am proud of that. I take a calculated risk and would self sacrifice for a cause I strongly believe in. I would not charge into battle and I would not protect anyone I have not placed higher than 92% on the Dex-Scale. Is that a bravery? No, it is a form of self-preservation.