Your photograph shows a mother and son? a lady and a kid? Do they know each other? or care about each other? This to me looks like a photograph of two strangers watching something over a wall instead of a portrait. The sign in the background doesn't add to the photo, it distracts. By cropping into the little boy, you might have gotten an ok portrait of him. If you know these people, you could have had her put her arm around him, and have them watch off the same way, movign to remove the background.
The colors of the young man and the lady are beautiful tho, and make their skin look warm. The color in the background looks true to life also.
This is a snapshot, not a portrait. There is no interaction between mother and child, no control of the background, and the only emotion seems to be boredom.
For me, I wonder how this would look if more of the wall was cropped out at the bottom. Too bad about the sign in the background - it detracts from the main subjects. I like the lighting though :-)