Good efforts, some suggestions:
Your character seems to be jumping around (his legs are not on the ground at all times) especially for the middle pose. I suggest you lock the feet down to the ground using IK. I can understand what you are going for, small hops on both feet, but without the legs bending a bit it looks weird. If you are doing the same pose you would need to bend your knees a bit, do the hop and land, rinse and repeat.
The same goes for your first kick animation, the right feet needs to stay in place during the kick and not move. Also, move the head a bit less, right now it looks like a bubble head!
Sorry for being so critical!