I find this one fascinating. Absolutely perfect choice of background color and I also love the border -- it sets it off nicely. What a great idea, great shot, and wonderful processing! (not voting, just commenting)
I love the monochrome, and the shade of blue is so perfect: it looks like skies I remember from my childhood. Also a rare case where I really like the border. The thin black line echoes the thickness of the twigs while the extended blue just feels like more sky.