Painting

I started work on a painting that I want to put up for sale eventually, so I was thinking I would go from first sketching through to finished painting videotaping the steps for putting up on YouTube, my only problem is, I can't decide on a subject to paint. ::pounds head on desk::

I am thinking to go with my favorite subject and make a dragon painting, but I'm not sure on that. I'll do some test sketches and see what I can come up with.