I have found it amusing how such a seemingly small matter has had so much discussion. I am also surprised by the number of riders who mention leaving the key in the bike, turned on. Like JLQ, I ALWAYS turned off the key to lock the steering head, and took it with me, even when parking in my own garage. But I always used the kill switch to shut off the motor. I had upgraded my Gen 1 switch gear to the integrated start stop switch, so that may have been a factor. And to add to that, on my quad (which has both a key and a kill switch, but is carbureted), I always use the key, but never the kill switch!