I love black & white structure. If I have one favorite thing to do in monochrome, anything structural from a cathedral to a scaffold is fair game. And, coincidentally, I’ve been reworking a lot of pictures from the past and many of them in black & white.
Briefly, on the subject of black & white versus black & white with bits of color: I eventually decided I like black & white to be at least monochrome. If not actually black and white, at least one tone and whitish. I’m not sure why I feel like that because I quite admire what other people do with color as focal points. Maybe it’s because I’m not all that good at it.