Almost completely without anythign to focus on, almost totally subject-less, this image becomes all about the muted sense of light, with even the colors downplayed (the temptation to shif them up in saturation must have been hard to resist). I like it quite a lot, but I suspect it is not faring well at the hands of the voters. From me, a 7.
With all the spectacular sunsets and perfect flowers in this challenge, I commend you for finding real beauty in the mundane. With a little saturation boost I would have voted a higher number than the 9 you've earned.
The sense of a warm evening is so strong here: beautifully captured and managed. I hope people give it the time it deserves, rather than dismissing it as a centred composition and therefore uninteresting by default. I like it very much indeed.