They're all great, but what I truely adore, is the one on the left. Most people when drawing halfhuman/hanlf animal hybrids, ignore balence. For example somone else drawing this may have had her with her tail curving up and out, a possition that ultimately would leave her off balence. with he tail curved under she is balenced.
I really enjoy the art, and this whole 'balence' thing is very refreshing!