BCos -- Nice, looks like you put a lot of work into this!
-The big guy's walk cycle is alright, but he seems pretty light and tip-toey for someone so bulky. Consider having him stomp about more, and I'd suggest having his arm swing heavily at his side.
-The ninja's inital jump and fall looks okay, but try having more speed at the end. It should look more snappy as she reaches him/the ground. I'd suggest to try going from a more extended body then snapping to her more curled-in one just when she contacts, as the contrast should make it more intersting.
-The part where she looks around looks very pose-to-pose. You need to have more follow through in the body, and secondary action. She should lead with her head, or maybe her hips, and the rest should be delayed. I also wonder if the problem is a lack of anticipation in all the parts, so I'd suggest check that, especially in the torso and arms.
-Her fleeing run is too slow. Her hangtime on the run looks weightless. She needs to move much more swiftly.
-Round 2 is looking good. My main complaint is just that her legs bounce back too much. After a quick jitter, they'd probably be done, or maybe just the foot would fall down. Right now, it looks like the right leg has some slight hang time after everything else has settled, which looks a bit odd.
Hope this has been helpful, keep at it!