In the walking animation, the legs look really weird on the frame where they overlap. I agree with Seven, make him a bit slower. Instead of being all fast, make him take one step at a time, hesitating between them. Or Have him hop (ya know, those kind of hop-limps you have to do when you step on something sharp.) on his good leg before slowly dragging the other behind him.
Make his arm drip blood.
Tear the shirt a bit.
In the attacking animation, he should have some more momentum behind his hit. Let his arm go back a bit, then hesitate before being brought forward. Then, when he does take the swing, let it throw him off balance slightly. As it is now, the attacking animation lacks any feeling of danger.
...Though I do like the pants...