I was never a fan of the grey background, I thought it was really ugly. I like this light blue a lot, it seems to really pop and bring out the text. I might consider a change down the road, which would be a time issue, but I can't think of anything that would look better than this off the top of my head.
So far I've heard from about 6 members about the new look, four in favor and two against including you.
If anyone wants to offer some design suggestions, color schemes that they think would look good, I'd certainly be interested in them, but to me right now going back to grey isn't an option.