these are looking better..however your not exploring enough. if you look at the exaple i gave you, each drawing is different and explores different ideas. The concepting phase is very important and exploring and doing things out of your comfort zone. THe gestures are looking good and has a nice sense of movement. Try to break out of your shell. Look at cool art and photos to inspire you. Reference is a super super important factor when it comes to concepting.
Good work!