If you enjoy using it/drawing it/etc. that is the only qualification for me.
It can be the best design in the world or have the best backstory. If you don’t like using it or it’s just not fun it’s not worth it.
That really generic toony style annoys me a little.
Same face syndrome. If I cannot tell if your animal is a wolf, coyote, fox, or cat we have a problem.
When parts of a style don’t match. Of you’re going for a cutesy style but do realistic eyes or you have ultra cutesy eyes but super...