I like the light and the scene, and the fact that the figure (placed very well) in the middle ground is wearing red, a little note of red, this compliments the larger areas of green and blue. Looking at it, I think that if you cropped about 50-60% of the grassy field, (darker area), and 75% of the sky above the tall building out of the picture, it would make it more dynamic picture, although with an less conventional picture ratio obviously. rexbobcat's thought that it lacks a strong interest might be that as it is, there's a fair amount of distance - visual distance. But it's horses for courses, and it looks good as it is to me anyhow. Just an extra idea.