Everything you said in this article were not just correct but useful for people into photography. During my training as an actor, a guest instructor came to talk about composure before camera. One of the things he said is that a picture can be bad with many flaw even if you take it with the best camera in the world.
He pointed out almost everything you talked about from posture, to costume to camera angle to spacing and how you place your hand.
For everybody that loves photography please do well to know the basic techniques before being bothered about the indept magic cameras can do.