As you can see by the varied avatars of our regular contributors, shapeshifters come in many furred, hoofed, and other varieties.
Most of my characters are wolves. The hero of my first published short story was a wolf, the hero of my first novel was a wolf, and the hero of my current WIP is a wolf.
However wolves are not the sole critter type in my universe. In my short story, Alpha v Alpha, my hero Damien Blackwolf is a lawyer. His partners include Kenyon Whitehawk and Chase Goldbear. One of Serena's business partner's is Lea Redcat. In Protect and Defend, Diar and Mikaela's real estate agent is Kate Blackbear. So yup, there are other possibilities.
I've started several stories with other animal shifters as the protagonists, but I just haven't gotten there yet. I haven't completely made up my mind about all the animals in my world yet. Right now, I have land animals and avians, but so far all my shifters are predators. There are other possibilities and I may explore them.
I considered dragon shifters, but they seem very popular right now. There are also several excellent authors already tackling that subject matter. Shana Abe has some fab books - The Smoke Thief and The Dream Thief. Deborah Cooke has also written some sensational dragon shifters. So for now, I'll leave the territory to them.
What's your favorite shifter species? Are there any species that aren't being written about currently which you'd just LOVE to see?