[Art][NSFW] Bombshells Naughty Sketchbook

[Chris2Balls [:B]]

Hey there Bombshell!

I see you're going more for a cartoon/animator way of drawing. Now, I can see you're using shapes to build your character, but I feel as if they aren't coming across as volumes. Another issue I have with what you've done is that these shapes don't feel like they're coming together. Mh. Why?
Well, I think it's the underlying anatomical knowledge that's lacking- first the skeleton, then the muscle groups. Here's an edit of your character, with variations on the face/bust:

You may note I changed the proportions. I think what you had before was on the high end of anime, which if is what you want, then fine, it just seemed unnatural.
The knees that you've done are an example: knee joints support the weight of the torso, which is over half the body mass; this is why they are usually so thick, especially on women (they carry the newborn):

Then, you seem to go over your lines so much that it creates problems with readability- try and be as clear and precise as possible! You have the advantage of being able to do things like erasing, going back in steps which you don't have in real life, so take the time to do and redo your strokes until you get the best ones and only them. Your second (grey) drawing's lines are similar to the first's, and this, as shown in your third version, means you've got difficulties placing and shaping dynamic lines. Staying clean early helps you work more efficiently.

I'll edit this soon with an explanation on making your character's chest look more 3d in the first pose.
Edit:

A cylinder turning into a ribcage, then placing neck, shoulders and breasts with the help of a central line. I think what made the way the breasts you drew look strange was how bunched up and vertically stretched they seemed. Gravity pulls them down, and they tend to part outwards.

I hope it helps. :B