i like #16, but the cat feels as if it lacks personality. I'm trying to convey playful/cute in the design in some way. I like the use of the whole body compared to a face only.
I would choose the cat on #16 if I had a choice between the 3 used. The other ones feel too masculine and husky for me. The head design feels like a crown, not very feminine/cute/palyful/distinguished.
It almost feels like the design needs an elongated cat, but not sure if that will work given the design you're going for here.