Grainger, your theory in your first post doesn't hold up when applied to French designed aircraft. Their rotors go the opposite way so they sit right skid low.
I tend to go for the theory that we sit on the right so we can operate radios etc with the left hand. This is easier than sitting on the left and having to swap hands on the cyclic and fly with the left hand, which in helicopters without stabilisation is not easy, and certainly not very ergonomic.
