I don't know, my friend - something about it just doesn't "work" for me. I think it's related to the cropping of her left elbow region AND so much of her left hand. Or maybe the small slivers of light background showing in the generally darker area of her inner arms, or just the light region on the bridge of her nose contrasting her darker liner/mascara. I mean, I can see she's beautiful-indeed, quite beautiful. But there has been some of your work that I can just get lost in, while for this one, my eye kind of dances around - eye, lips, light, eye, light... In all honesty, if I'd have done a shot this well, I'd be crowing, but you want an honest response, not false praise. It's a good shot, but not a GREAT shot, IMO. And I've seen many great things from you. But that's what Muses are for, if my dim memory serves me well. Encouragement to shoot some more.
OTOH, I love your new avatar. Taken on an apprentice, I see...