I really like this! The first thing I said to myself though was "Why the teeth bricks on the edges? Seems like a excess amount of polies as you can just make the texture seamless. Though normal map seams may appear." But at least you tried it and saw the benefits and mistakes. Valuable information and learning!
Loving the high poly work and some cool textures too! Looks like you could make a nice dungeon master clone with a bit more work, planning on going the full 9 yards?