Needs more practice.

Aye: and I am. Most of it is getting the knack down for the flow of a woman's body. Any constructive criticism on other things I could improve on would be greatly appreciated.

Best not to ask me, man.
My drawing skills are not well enough to go there (that, and I barely practice with female figures as of yet)

But, what I do know, at least, is some basics.

If you are good with drawing male figures, you're halfway there.
Aside from that, try looking at the female hyper drawings here and practice with that. Yeah, they're exaggerated on the curves, but I believe that you got a good start when you got the curves down (maybe, not sure about that)

The big differences are: woman have a heart shaped rib-cage that points towards the neck (men have a more barrel shaped), women's hips are wider then on a man, the little hour glass curve, breasts (everyone gets that one, but the are not present on younger figures), and women have more subcutaneous fat then men, making all there curves soft, apposed to sharply defined muscles like on many men (I am not one).

The left figure got all those aspects, and it had a decent gesture.

The others though: they were mostly screwed up with perspective and their gestures mostly. I just need a lot or practice: lots and lots of practice.

Though, I do question the how well I did the butts.

Well, I can only say from the center drawing, but it seems you got a lot of practice headed your way.

Thank you for your kind words of encouragement.