I got in the habit of using the kill switch because when I get home at night I need the lights to still be on while I'm turning the bike around in my narrow driveway, and when it's late I don't like to keep the engine running while I do that. So, hitting the kill switch leaves the ignition on and the lights on. And of course, it also leaves the tunes on for me while parking the bike. I never have a problem leaving the ignition on because I have a habit of locking the ignition every time I park.