Geoffrey,
I see what you're trying to do and applaud the effort, but for me it does not quite work. To make it better I'd crop off the entire top half (just kidding, Russ)...
I very much like the chaotic and lyrical qualities of the spray paint and cement cracks and the way the curb is curving into the background, but feel that the static, organized structure of the bricks on the right side brings it down. Sort of like having a great party, then Melvin the bore showing up and ruining it for everyone.
Don't get me wrong, I do like it, but not as much as I could have.
Chuck
p.s. Crap, on second and third look I like it better. Could it be I was wrong?