A hidden factor is eye dominance. If your trail eye is dominant, you might like an open stance. Lead eye dominant, you might like to lean or turn your head back, ala Jack.
Iโm RH and right eye dominant, and if I could, Iโd use an open stance. I use the Moe Norman swing. He was left eye dominant. I struggle with turning back in the swing because my eye doesnโt want to get turned away.