There is not much discussion on my answer to this, but it's definitely some sort of canine. You will see me around the South Pole all the time as a wolf, especially. I am very fond of the canine models, and I usually design them with full tufts, realistic colors, and flame, eyecover, or large mohawk manes. They all seem to have slightly rare names such as Theory, Mattik or Aeryn. It also appeals to me that wolves and dogs seem to be the only animals I can roleplay as correctly, since I love my canine species and I know a lot about their behavior and whatnot. It has been a long, long time since I have roleplayed as a feline.
The last time I have truly roleplayed as a feline was back in 2011-2012 when I hosted a well known and very large warrior cat roleplay. The clan slowly started to decrease and since then I haven't had much interest in felines. I love all kinds of felines though, I'm just not able to roleplay as them correctly. To be honest, the feline models aren't really to my liking.. So to shorten it, my answer is the wolf.