Stumbled on this quite by accident, but felt compelled to comment. XD
Your anatomy is pretty good, as is your soft style of colouring, so well done on both!
But one thing REALLY lets this piece down, and that is her breasts. They look like they're drawn by someone who has never seen or handled a real pair before. Real breasts have weight at the bottom, and do not sit like balloons on the chest directly under the armpit like you've drawn here.
If you look at the picture of the blue girl in your favourites, her breasts are big, sure, but they are believable which really sells it. They're affected by gravity. I see so many artists who are afraid that they'll draw unappealing, saggy breasts, but it's simply not the case! :)
I guess what I'm trying to say is big breasts are fine - inflatable ones look very silly!