Great job of capturing a moment in time. There's a story to tell here and the additional elements beyond your main subject tell it. Minor nitpicks: I would have cloned out power lines and brought out a bit more in shadows. My favorite so far in the challenge.
This is a compelling image. Makes me want to look around a bit. Guess that works for a postcard also. :D The passing bicyclist is moving into the photo with room in front - that's good. Do wish I could see more of his face but the lighting wasn't cooperating for you in that regard. Looks like there is two, maybe three animals in the front yard of the house in the background? :) Good luck in the challenge.
seems like a chance snapshot. a head-on perspective or at least a view of his face would have made for a more personal post-card. Also the composition is not very strong, with the partial house, the power line coming out of his head, and a partial sign on the left. I often have trouble with the same thing. I get so excited about the main subject, and don't even notice the background until it's too late (back home a week later!)