I've been hooked on the idea of battle turtles for a couple of months now, and basically playing off of the idea of Master Oogway from Kung Fu Panda. My own attempts have gone more cartoonish, but I love the grittiness of yours, and the way you've played with head shapes. Check mine out if you get a chance.
Hey thanks. You have some great ideas there, I really dig the samurai one. If you want to continue you could try to work out the shapes and proportions better. Look at pictures of turtles and capture their most striking features. I am a huge fan of snapping turtle, I find their shell and headshape very interesting.