Assuming that I know that the person is reasonable OOCly then losing or being wounded is perfectly valid, although of course this depends on context. If the other player's character is, for example, a well-known and successful street brawler, my character wouldn't begin antagonizing him without an established upper hand to start with.Â
That being said, in Nero's case specifically, I have him written to be combat-able enough to win in fights against NPCs, but not trained or experienced enough to win against battle tested player characters. Part of this is because combat RP is an extremely slippery slope, especially with someone you don't know, and bruising somebody's ego because they feel that their character should easily win is a pain that I'm not very inclined to deal with, so I try to avoid combat RP whenever possible because I find it to be horrendously self-indulgent at its worst.
That being said, in Nero's case specifically, I have him written to be combat-able enough to win in fights against NPCs, but not trained or experienced enough to win against battle tested player characters. Part of this is because combat RP is an extremely slippery slope, especially with someone you don't know, and bruising somebody's ego because they feel that their character should easily win is a pain that I'm not very inclined to deal with, so I try to avoid combat RP whenever possible because I find it to be horrendously self-indulgent at its worst.