I think I understand what you mean.

I couldn't settle into a species, first I was a cheetah, then I was a tiger, then I was a taur, and then even more things, I just didn't feel 'comfortable' with them.

But one day, after about four years of trying to define myself, I met someone who talked me through it, they helped me find out what I wanted in a 'sona, and if it weren't for them, I wouldn't be the hyena I am now.

I could try to do that for you if you want? Or even just talk about it for a bit and try to work through it?

Is there anything that makes feel attached to a particular one?

Took me about a year to even settle on a fursona species, and another 2 and 1/2 before I finished changing around my fursonas to how I like them. It can be quite frustrating trying to narrow down what you want in a fursona, but you'll eventually get there.