Those are some pretty nice animations. Well eased movements and fluid.
-The only thing I saw was that the feet on your most recent shake a little in two places I believe.
-As well as on the sniper thing, the light blue figure's walk was a tad bit stiff and the front leg snapped to the ground. Ease it instead. One other thing on it was that the red figure's reaction to the kick was a little failed. It was a little stiff, and the reaction's ease was off. Remember, instead of |-|--|...blah blah blah, it's |----|--|-||.
-It starts with larger movement space, and then(depending on hard the impact was) it quickly eases to little space(small impact). Huge impact, however, is something different. One last thing I saw on the sniper animation was that the second burst of blood from the light blue figure seemed to float up. Remember gravity. What goes up, must come down.
-On the gift thing, it was perfect until the last jump. The legs looked awkward and they just floated up. Try bringing one leg up at a time, because when I make a huge jump, I usually have one leg out first to balance my landing, and then follow through with the other leg.
-On the hammer thing, you might just want to look at the easing and movements again.
-The rest of the animations were awesome.
-Overall the animations were really fluid, and well eased overall. Some shakiness and minor misfires, but I enjoyed watching every one of them.