I gave this a 10, because in thinking about the pictures later, this is the only one that I really remembered, that kind of "haunted" me. It's because you've captured something universal - and if not universal, then at least something American. It doesn't matter who these boys really are, the photo has an "every boy" feeling. I like the sepia tone - the only thing I coulod say negatively is that it's not as sharp as I would have liked. Really great job.
I think you could have lost most of the empty brick on the left without hurting the shot. A great "attitude" shot and the monochrome is a plus on this one. The boys looking in the same direction, but away from the camera add to the "attitude".
Like the effect here, nice tone, great border, really compliments the shot. The wall leads the eyes back to the boys. Highlights look a bit blown but a good shot overall. 7