Chess Project Thumbnails

So for my new Computer Arts class--which I'm really excited about--we get to make 3D chess sets--which I am also really excited about

Our thumbnails are due today and of course I just did mine now. Our teacher's gonna comment on them today and let us know which ones are okay and which he likes and what not. If you guys wanna give your opinions on which one's your favorite I'd love to hear I'll post the finished one when it's done.

This might be my drawing for today, I'm not sure if there will be another PP or not. Basically I just wanna draw something every day and the PPs are in case I can't think of anything and need some color practice.

Also these were drawn in Autodesk Sketchbook Express. It was a free app at the Windows 8 shop. It's kinda hard to use in my opinion but I'm getting used to it. Any of you guys out there have Windows 8? Any drawing apps you like?