It's partly because of the look of using a larger frame of film, partly the texture it imbues, and partly because I'm just more careful when using an expendable resource, but as I've mentioned before, I get more keeper photographs when I shoot with black and white film than when I use my digital SLR. These are from a couple of recent rolls:
I didn't have to go far to get them either—I took all these pictures either in our house, in the yard, or at my kids' school up the street, all with natural light and no flashes or reflectors. I'm certainly not regretting my purchase of that used Nikon F4 or macro lens last year.
Time to pick up another roll or two of B&W, I think. I've run out for now.