Bones actually paused, trying to give the question a non-flippant answer. For once.
"Back home, I was always the one who fixed things. Whatever shit Jim or the rest would get into, I'd fix them up, then yell at them. Even before Starfleet, I'd fix everyone else's problems. Used to make me pretty angry, watching everyone make the same mistakes every time, and expect me to bail them out or patch them up."