Not to be rude or anything but putting giant disclosure and legal crud at the bottom of the pic is pretty laughable. I mean, anyone who would want to steal your work will just crop it off like it's not even there. If you are really SOOOO concerned about art theft then look into watermarks. you'd think it'd be distracting from the image but it actually is more subtle than the giant black text.
I think "cautious" looks the best. The form is stylized but still has a genuine sense of movement. I really like it. 'Concern' looks the most anatomically wonky to me but that could just be your style.
Are you going to add color?