Cropping in the viewfinder

I've been cropping in the viewfinder for a long time now. I don't know where I picked up the habit or when. However, I'm starting to realize that I need to leave some margins. Somehow, some way, the picture's going to need a finishing crop.

In any case, here's another shot from the photos I've been selecting. I've got a ton of pictures on my hard drive and it's time to get some printed. What do you think of this one? Is it worth printing?