Probably both will kick butts when necessary. Butt kicking does not always work, there are other more efficient ways to motivate your athletes. You just have to take the time to analyze your athletes. Positive action is always better than negative action and you have to know when to use either and have a couple of leaders who will provide help in the room to motivate. For me it is all about respect, you respect the game, yourself and your teammates and put out the maximum effort every time, mistakes are part of the game you want to minimize those without making your players afraid to make a mistake...which ultimately causes more mistakes.