My shading still bothers me. I just can't wrap my head around the whole concept. I never know where to shade, even when using several reference pictures. And my pictures get so few views that I barely get any constructive criticism on my work. Oh well. I just gotta be patient and keep working at it.
I'm not a great artist and I don't draw much, but for myself I noticed that my shading stunk because I would try to shade one part a time without keeping the rest in mind which make the whole picture look flat and wonky. I realized it's much better to use shading to add contrast between the different surfaces and parts of an object, such as a person, rather than trying to add depth to everything individually. Am I making sense?