You are using your right side of your brain now. You where drawing what you think things look like at the start, now you are drawing what they look like.
Its a nice feeling isn't to be able to draw whatever you want. I'm sure if you keep this up the sky
is the limit.
Check out my artspace for a doc on the right side and how to keep it active.
http://severeo.deviantart.com/
Keep posting work in this topic. Its great and don't forget to keep pushing yourself. (which it looks like you have been doing anyway but still, art is about change)