No one is going to try and change your personality. However, if you don't take critique well, then people will stop giving it and that will be a bad thing. I forth everything Nimu, Lotus and Fawn mentioned. It is your choice whether you take on the information or not, but if you do, it would help you a lot.
Most of your problems come from your limited knowledge of human structure. Your forms lack shape that comes from muscles and bones. You need to look at some photos and anatomy books to gain a better understanding of why the shapes are the way they are. It will help to give your characters a more solid presence. Right now it is like you are tracing a silhouette without considering what is making the shapes happen.
I did a red line of your latest figure.
The main things I noticed is that the pose is a little awkward. The head is pretty movable, but the shoulders and torso usually line up. People do not stand comfortably while twisting. You need to shift the shoulders to an angle. The breast muscles connect to the arm muscles. You can notice this very well with males because you can see the pectoral muscles flow from the arm, but females have extra fat in that area. Another area is the waist. There is a lot of bone in that area and the edges of the pelvis are usually visible in males and females to a certain degree. You also need to look at the crotch area where the legs join. The arms are not straight as the contain a lot of muscle and bone. make sure to slim the arm at the wrist before drawing the hand as well. And ears, don't forget about ears, they are good markers for the facial features.
Overall, it isn't too bad, it just lacks a lot of shape that makes the human body appealing.
