First of all, you're a wonderful traditional artist. I love your shading and the little details, down to the lip cleft!
I love love love the way you did the hair in the second piece, but it's a little disproportional to the rest of her - it makes her forehead seem really large :3 if you're going for that fluffy-poofy anime hair look, try showing little bits of hair sticking out here and there, like she did fluff it out. The shading on her breasts is really well done, but they're just a bit too high - her nipples would show halfway! D: Love her eyes and lips though ^^
The first has a really great style. I love how your eyes are drawn up the length of the bustier. Maybe it's because I love drawing curves, but I found my eyes focusing on her panties and being traced up to her breasts. Only then did I notice the wings ^^ I like it. You may want to round out the bottom of the panty shape just a bit though - remember, there's never a single sharp angle in a woman's body <3.
Critique me back, please?