What makes them not interesting?
Like what other people have already said, I seriously doubt there's anyone that hates your fursonas.
The style is kind of simplistic, but that's not necessarily bad (unless that's not what you're going for). It doesn't look bad. I'd say that if you think anyone doesn't think they're interesting, it's probably because of this, and that's just an opinion.
Also, any stereotypes that are "portrayed" in the fursonas are just based on individual people's stereotypes, so you can't eliminate all of them.
What matters most of all, imo, is that you like your fursonas. If
you want to convey a little bit more about your personality, go ahead and change some things around. You won't get hate for that. But if you think you
need to because of other people, maybe think about if you really want to do that.