This is one of those questions where there is no wrong answer. It's personal preference. On my planes I prefer to pull out the switch to come on, but others I know prefer to push in to turn on. Which ever you want to do is the right answer for you. The only thing I would say is that whatever you decide to do make sure you always do it. Staying consistent is the best way to avoid anything "accidentally" happening, like leaving your plane on and running the batteries down. But other than that, it's up to you.

Ken