I really do appreciate all of your suggestions. This is a learning experience for me. I re-adjusted the curves and contrast in my Raw converter and added some saturation. I also tried a brown-toned B/W conversion. All versions should have a bit more punch now.
Mark,
I need to give some thought to your dodging/burning suggestion. I agree the photo is busy, but I'm not sure what to do about it. I thought that the components (mailbox, window, colored tiles, ivy, old wood sign, etc.) all tied into the "old", "deteriorated", "antique" theme, but maybe it is too distracting. Hmmm....
Here's the punchier versions. Any additional comments, good or bad, welcome.