complexity and simplicity
Choosing black & white is sometimes easy. Color simply doesn't make sense.
Like when I found myself in front of the beautiful Lockheed A-12 Oxcart. Black & white is the only valide option
But sometimes, after a few hours on Lightroom trying to make that picture work out, you understand that black & white is the right choice. And then you spend another hour trying to figure out how to sculpte the light and the dark.