Hmmm...I don't think you're ruining anything at all with the border. I guess that's why I stole the idea from you last year. The MAIN reason that I've been going with a border with my shots is that the Micechat yellow doesn't really do much for photos. I think it's good to offset your shots a bit with a border of some kind to give them a bit more pop against the tan/canary/something/yellow background. And more than a few folks around here have watermarks on their photos, so I'm not sure where the "ruin" comment is coming from.
On the other hand, your photos just keep getting better and better, DPG! I especially love the last couple of batches. Every time the sky lights up and I'm stuck at home, I wonder who the lucky folks are who are in the park with their cameras. One of my favorites is that shot of Big Ben glowing against that sky. Thanks for your continued brilliant work!