Interesting thread, Sharon. Re the vendor, I like the crop, particularly as it takes out the white areas on the road. Ones eyes tend to go to the brightest part of the image first. If it was my image, then I would add depth of field which would be worth the effort in this instance. Nevertheless, I do appreciate that you do not like to meddle too much with the image, and it would take away from the natural street feel. I would try lightening his eyes and see how that works. Almost invariably lightening the eyes of such images can do wonders.
However with the lady and dog I would definitely tone down the whites of which there are a lot.
You may soon be an updated Vivian Maier!