While I didn't use a picture in my application, I think the primary focus with the picture is to connect a face with a name and help to personify your paper application. I think its easier to imagine you in the class when adcoms can picture your face in a seat rather than some obscure set of facts about you!
Keeping that in mind, I'd say anything that allows them to picture you in their heads and remember your by your face instead of just your name is accomplishing the goal of the photo.