I drew this tiny gold deer vertebrae on a white canvas and couldn't figure out why it kept bothering me when compared to it's black contour counterpart. Luckily, my sister came along and suggested it needed more weight. Usually I don't backtrack on my art once I've considered it a finished piece and I do all my tinkering near the beginning of a project, but I took another stab at the final piece and filled it in with black:
I liked the new version a lot better so I filled in the black one too for more contrast. Good suggestion, sis! That's what it needed indeed.