Shooting pictures of somebody else is really hard because besides the fact that your trying to take a good picture and you have to set up the camera you also have something else that your trying to change and that's kinda hard when the model doesn't know what your doing so you have to tell them where to stand which way to look and how to pose.
Being the model is just as incredibly hard because you have no idea how you look and it's akward and you feel like your traped there and you don't know what you should do next. I think the photographer and the model need to have an extreme verbal connection when shooting.
I think a good photographer is one who knows how to multitask, is creative, and knows how to talk to people; and a good model is one who is helpful and can follow along with the task.
