But then again, probably about 80% of the time, it turned out that they didn't actually have to put the villain down, but instead just convert him away from the dark side with some good reasoning and/or the power of love. Or, he turned out not to be that bad to begin with. In fact, as far as i can remember, Tirak was the only villain they ever actually killed (murdered in cold blood with the use of a rainbow no less!).