Welcome to the forums! First I want to say that you have a wonderful style, looks like watercolor but with rich colors. Your color choices are also really nice, it looks like you have a natural ability to choose what colors compliment each other. Are you working digitally or traditionally?
Places to work on, I'd say angles, pose and making sure you use reference. All of your characters are from a straight front on view, it would be great to see you try to mix it up with different angles. Also, overall the poses you've chosen are very static. Adding motion to your characters will help bring them to life. Animators, like Jake Parker, tend to be good at having motion in their drawings since they have experience studying every frame of a given action. This also gives them knowledge of weight, what looks natural and fluid.
Again, welcome, it's great that you're here to grow with us!