Personally, I try to w/hold from taking a quartering towards me shot until the bull provides an opportunity at either broadside or better yet slightly quartering away. That pic is tough to tell, a big factor for me is the position of his front left leg. The leg facing you gives you a better idea of the position of his shoulder blade, if I were to take that shot it would have to be tightly placed above his elbow. I'm not a big fan of that shot, however being there at that exact location w/that exact bull could drastically change my way of thinking.
Great Bull, thank's for sharing the pic!!