I naturally gravitate towards open stance. I couldn't imagine shooting closed stance, but everybody is different. Asbell's latest book advocates a shockingly open stance for hunting purposes. This opened my eyes. I was shooting square stance, switched to open stance, about like in the picture posted (left foot at 10:30) and immediately started shooting better. As he talks about, I can also see how a more open stance would be more natural for hunting. But a lot is what feels right or works. I get my best results with a stance anywhere from 10-11:30.