Over the last few days I have been exploring the question of color in street photography. Most street photographers go black and white all the time to eliminate distractions from brightly colored signs and clothing in the background. A few have been successful shooting in color. I can't define it exactly, but it seems to require some important color information that adds to rather than distracts from the scene
For me it is just a feeling I cannot explain.
The "churchyard sale" series looked great in color, then I got rid of the color and threw out a lot of details ... that is when people started to very strongly respond.
In other cases the other way, the colorful way might be best.
After one year I should really re-evaluate the "cremation" serie (color) and the "funeral" series (bw).
Very interesting point you make, esp. as we do not decide before we shoot anymore.
In film days I had one body with color slide and another with BW film. I knew what I did when I took the picture...