"what makes a good fighter?"

heart.. you have to be able to shake off hard blows, and keep coming back.
quality/ consistency of the fighters you're fighting.
respect. i think most fighters have to feel respected. if you have all the mental and physical pressures of training, and you get disrespected, then won't you question the reason you keep coming back? and why they give you shots in the first place? add physical mental pressures to that, i think you have sort of a time bomb. i don't know of many people that could last long like that.
good trainer-- good trainer not only knows the game, but knows what pace/ level he can push his fighters at/ to.
i think a record has something to do with it, if the uneducated fans look at the record, that's mostly all they know about a fighter, and they'll think that's how you measure a good fighter. but if the fans know the game, the fighters background/ history, or if the fan's another fighter, they'll know whether or not he's any good.
i don't think wins on records should be the issue. i think it's how bad you want to win. what you'll do. right time, right place, right combination, any body can win. like the movie says, "any given sunday...."