Here's my entry for the TheOneRing.net's competition. I might not win, but DANG, I'm proud of this.
I added stripes to Smaug's design because I wanted to add the sense of him being tiger-like and very feline... it's all down to interpretation, I suppose. Plus, I never want to draw coins ever again.
Artwork (c) Lizzie Cavanagh
Smaug (c) J.R.R. Tolkien