I like the concept. I think this type of photo, perhaps with signs that contradict each other in some manner would be very interesting. Its hard to put an emphasis on negative space and keep the photo interesting, which means the subject needs to be extraordinary all by itself. Nice shot though -8
Idea is solid. Uncooperative sky, though. The metering mode in your camera caused the signs to underexpose. If you can, you can set metering for center weighted, center focus on the signs (thus metering them properly), reframe, and fully depress your shutter to shoot. Also, you might get better color if you calibrate your auto white balance against the clouds in the sky, as they are your radiant light source. Whew! that's a mouthful! - mjcecil
Overall, I like the colors, and the texture of the clouds in the sky, but it seems a little flat to me for some reason. Maybe a different perspective? karmat