Overall, a brilliant synthesis of architecture, creature work, character work, composition, and technique. As has been said, your attention to detail is top-notch and is complemented well by a robust visual read that builds up from your ornate base to a brooding diorama of Smaug's lair. You've got my vote!
This is really fantastic work here, the sculpting of the dwarves are great, the architecture is awesome, and Smaug's head is amazing! I really love the idea, I wish you best of luck!
P.S. You have a lot of gold!
I was going to mention how well awesome the base is, but that's been said already.
I was going to mention how cool the walls look, but that's been said already.
I was going to give you kudos for Smaug himself, or for how the whole scene comes together so nicely, or for the amount of shiney gold you have!!! But, that's been said already.
Instead, I think you've really captured the Dwarves very well. Good job.
(I really hope that hasn't been said before...)