Hey there! Great shape simplification! It's also great that you included a value scale, though I would recommend starting out your grey tones even lighter, as they are currently starting more in the midtone range, causing the overall drawing to get darker and difficult to visually distinguish the shape groups. Softer pencil pressure is the best way to start lighter, though using less hatch marks can also help. I think once you apply this, it will definitely highlight the three-dimensionality you already set in these drawings. Keep up the good work! :)