Definetly one of the smoother, well paced, and stylish claymation I've seen on NG, (and trust me I watched 90% of them). You have talent to say the least!
I couldn't help but notice that your clay sticks to the surfaces you have been using for this, and that sometimes your clay got "contaminated" by other colors, (I know it can be hard to avoid...). I cannot suggest very much to solve this problem, but I can suggest another type of clay you can use that is resistant to, at least, the contamination problem. Have you heard of polymer clay? It works wonders, it is very smooth, and streches instead of ripping itself apart. Such a brand of this clay is called Sculpey, but there are others... Well that's all I have to say for now! Keep up the great work.