Small change, big impact

A couple of weeks ago I painted part of our upstairs hall. I decided to paint the trim the same black that I'd painted the doors then chose a charcoal grey (Benjamin Moore, 2121-10 Grey) for the wall. It's a very dramatic transformation. The question is do I like it enough to carry it through the rest of the hall?

P.S. I'm making my next move cautiously - as you can see, I'm being watched...