Personally, black and white photography is rarely the effect of my work, although I happen to choose shots that fit just perfectly for that role. What really matters the most in black and white photography is capturing the flow of light, forms, shapes and contrasts.
It is very often the case that color tends to divert the recipients attention from the true meaning of the shot; it can be outright dispensable. In cases like this a black and white photography comes into play perfectly.
What can be observed on many shots, once we remove the color, is increased visibility of shapes, curves and borders in between them complementing each other. The whole scene gains distinctness and clearness.