I'm loving the levels at which her top and skirt are cut. Kind of hoping for a bit of her areola to be visible, with her nipple just below the ruffle band. The decoration on her clothing is just enough, too.
Also, I'm begging you for a non-nude no-panties version. Though I hope you'll place the tail a little lower and flesh it out more in the next sketches, right now it's too small-looking.