I noticed different people have various ways of holding their controllers, and more importantly, positioning their fingers on the controller.

The instructor I have uses his thumbs only on top of each stick and in fact, my for my first lesson he had me place my thumbs over his to get an idea of how much movement was needed in order to move the airplane in it's different directions.

My question is this, and I hope this isn't a stupid question. I use the thumb of my left hand for the throttle/rudder controller, but find it more comfortable and have been getting into a habit using my thumb and first finger on my right hand to sort of 'grip' the right stick.

Is this a bad idea or doesn't it matter? Is there a correct way to position the controller, ie with a strap and at 45 degrees for example, and the finger positions on the sticks?

Thanks in advance.