Sketch Day 2

So at the behest of the drawing books, and as the advice of my friend, I attempted various shapes - looking at how various shapes can be drawn, and how they work in various forms with each other.  I harbor no illusions that I have any mastery, but I did learn a little how I need improvement.  Shading for me is right out, and I still have a hard time pushing the three-dimensional envelope to make a sketch pop out.  So, without further adieu, here is today's sketch sheet.  As always - comments are appreciated.