It. Took. Forever.
I couldn't decide on a species. I drew tigers, turtles, salamanders, domestic cats, arctic wolves, aussie dogs, corgies, ponies, dragons, orcas, pandas, raccoons, skunks, owls... and other stuff I can't currently remember. I drew several designs for some of these species. I wanted something that not only fit my own personality traits and quirks, but also something that I could kinda already look like to some human degree.
Bunnies crossed my mind a few times, but I never drew any that were really meant to be me, until a few weeks ago. I randomly started drawing myself as a bunny, and the more I drew, the more my brain was like "YES." And when I was finished with the drawing, I just knew it was the one. And that's how my sona came to be.
Tl; dr- I over-thought it and couldn't make a solid decision until I turned my thinking off and just drew what came to me. And it showed up on its own.