Akyo, I love your concepts!! The mossface devilsaur could totally fit into Cataclysm, as if he was snoozing buried away and all the climate changes/earthquakes woke him.
I love your great detail and understanding of the facial and especially foot structures. I wish I could make such anatomically believeable toes! (Mine are more like chunky little sausages with a nail sticking out. )
As for your question, I sometimes think of a few model variations I'd like. My most recent one Ive been contemplating is a tallstrider model that is less like an ostrich, and more like a water striding bird. It would have wider webbed toes, a narrower longer beak, and longer wing and tail plumages. It could wander in shallow water, with feathers in blues, whites, and grays. I guess the hawkstrider is a step in that direction, but I think of it as being even more like real water-stalking birds, only taller.
Otherwise, Id like to see a couple of wolf skins with more realistic fur patterns, such as a gray wolf. Id like to see bobcats too. Also, while I enjoy our current turtle model, I'd love a second model with a more streamlined smooth shell (as opposed to giant spiky pyramided shell), or perhaps a slight keel running down the center. Spotted turtles, map turtles, redfoots, and eastern box turts all have interesting colors and patterns that could possibly be used.
EDIT: do you have a devart account, by the way? id love to see more of your pictures
You've got a really awesome style. 
