My personal preference would have been for a slightly longer depth of field. Perhaps 2 or 3 stakes instead of just one. I think it'd make for a more powerful image.
This is a good idea for the challenge. I think if the DOF was deeper to show more of the top of the fence that it would illustrate a pattern more clearly.
6 - Nice. Criticism; 'if only' you had left the pattern of either the in focus 'post' (ie; it not cropped at the top and so tightly at the bottom), or else allowing more of the pattern of the 'others' to come into focus more, would have made this better in my opinion, but does of course deped on what you had to work with.