The last strike on the first animation is especially smooth
it kind of 'cheapens' the feel of the first two in comparison. imo.
The running animation is too slow... there is no difference between left and right leg, and I guess you got away with that at this resolution
but in higher resolutions, having a short run cycle with same-looking legs wouldn't pass I think.
The skin color is a bit too pale for my taste... lacks too much saturation in comparison to his clothes. It kind of blends in with the background of this forum, so I can't tell the exact shape of the cluster easily. Change it or not, depending on the BG that it will be displayed over.
Overall, nice job