I have always considered Black and white photography the real art form of photography. The representation of the image that can be represented just by the two colors is simply amazing. It also focuses the viewer to pay attention to the details and the subject rather than the colors which in some cases I have found to be a distraction.
In a sense, for me, Black and White photographs speak more than color photographs. Not to take anything away from color photos for they have their own place (and I take a lot more of them too), I personally favor B&W photos. Below is a review of a very good book dedicated to Black and White Photographs: The Art of Black and White Photography