|Kumquat Shapes and Textures - Leica MM, 90 Summicron, f/5.6, 1/250s, ISO 640|
The thing I find interesting is that of the ten, color is only one and the rest are independent of color. We were also taught to be careful about the number of visual elements we included in our photography. Too much would increase the cognitive load and so sometimes as a photographer you had to work to remove an element. As a result a lot of photographers convert a color image to black & white as to remove color from the visual load bringing the focus on other elements. Of course it doesn't always have to be color you can reduce the others like say movement (by shooting a faster shutter speed) or dimension (by avoiding layering of planes or perspective) or tone (by processing to push finer tones together).
When I typically make black & white images, I use the color information to bring forth other visual elements (usually dot, tone, shape or line). If I had used a color base image for this one I would have likely used the color (i.e. hue) difference between the orange kumquat and the green leaves to make the little round circular kumquats pop out against the leaves. I would make yellow/greens map to darker tones and orange to lighter tones. But what I saw was a touch of sun light highlighting the edges of the leaves. So with no color information and just a lot of black and white tones I adjusted my post processing so that the shape of leaves were emphasized and the attention brought to their texture (which one sees better when viewing this as a large print). I don't claim this is a better way (or even a good way) to make black & white images. Its different and it is forcing me to break my habit (or perhaps over dependence) on hue to make black & white images.