I like this shallow depth of field. I like the diagonal lines as well. This shot could maybe use something to provide a focal point though for a little added interest.
For me, this needs to be entirely in focus to make a graphic impact. The blurred areas don't make enough of a statement yet they occupy the majority of the frame. On the plus side, you effectively isolated a single area of pattern, which to my mind is how to make a good photographic statement about pattern.
6 - Good perspective and use of DOF, especially to fit the Challenge well. Criticism; difficult, needs 'something' to 'raise' it in my opinion, no idea what nor how, perhaps adjusting the tone/color, not sure. Maybe more height for added 'pattern effect', but not sure on that either.