A Close Crop

Compositionally, this is a very simple photo. The subject, Andy, is off centre because that is an interest raising factor and his eyes are just above the centre of the frame. But what about the crop? How close should you zoom in on your subject? Personally, I like to get in close and in so doing I break one of the cardinal rules of photography. By tradition, you should never cut off the top of your subjects head. But why? There is nothing of any interest going on up there. All the action is going on around the eyes. A close crop, in my opinion is the way to go.