A wolf I sculpted just based off some random reference images from google. First thing I ever had 3D printed- I'd say it came out pretty well!

This was the reference image that primarily helped me make the model:
http://www.indiedb.com/games/crusaders-quests/images/ravenous-black-wolf-concept

I actually talked to the creator of the concept art on deviantart a while afterwards- he was fine with with this use, and thought it looked pretty cool too!