Usually, I look at portraits and either find poker faces with "standard" faces. It's a real pain since faces are a VERY heavy element of any picture, it's the first thing you look at.
*Shayne13 has managed to restrain from a standard portrait or resort to make a simple representation. But it's not the composition that speaks to me. It's the fact that the human portion of the face is challenged within it, the mask/tattoo/whatever it is, ravages the human association we give it. And don't get me started on the literal cut in the neck.
The frame is the final piece. It provides a border that concentrates our focus to the center. The elements there are interesting but don't drive you from the portrait.