Those are pretty great! I really love the water-color effect you have on the third one down, on the dress; it gives it a kind of texture. I think the only suggestions I would make is maybe adding some light/shadow play on her body and hair to go with it. It doesn't have to be much, just maybe a subtle little indicator of where the shadows would fall.

But that water-color effect on the third really is lovely. My favorite of the lot of 'em.