I have noticed lately that some of my pictures are almost monochromatic, with only little blotches of color. Downtown Johannesburg in the harsh summer sunlight is just that way. I could just make them monochrome in Darktable. The images would probably be improved, but for some reason I like them this way. Here is an example of what I am on about. If I cropped out the traffic light there would be almost no color left. There was no post processing needed to achieve the effect. I only tweaked the exposure and contrast.
Join in and show us the best of the worst sort of light and scenery. I am not talking about monochrome with spot color, but if you want to do those it is OK with me.