Ooooh this looks like a fun thread. I'd have to say a wolpertinger, definitely. The creature the mask I wear is based on 
They are an unholy amalgamation of several woodland critters, but most frequently things like rabbits and birds. They're horny little fellas (pun intended) and supposedly the only way to catch one is to lure one out of the woods with an attractive woman.
Other than that, Wyverns for sure. I love Wyverns, they are so fun to draw. Call me crazy but I prefer them to dragons.