Nice color, almost metallic in feel. Your image might be helped with adding a subject or person sitting in the background maybe just beyond the gutter on the right. Just an idea. I like that the sun is just peaking above on the left. Nice touch.
For me personally, this would be art alley. I'm in the school of graffiti=art, not graffiti=decay. Probably the sharpest shot I've seen in this challenge thus far. Obviously an hdr shot as well. There's no way you could get the sun facing into the lens and retain the detail throughout the alley. No vote, I'm in this one.
I tried to find some cool graffiti like your image. My town is just too small. I really like this image with the POV, clouds, depth it all comes together for a really nice shot.