Take a look at my thread: http://www.stickpageportal.com/forums/showthread.php?t=106645 . I haven't updated it for a while, but it's the old anims I want you to look at. They are shockingly bad. If you keep trying you will improve, don't worry.
I got nothing. You know what you're doing better than I do. I suppose the smoke could have been dragged out over a few more frames and faded more but that would have been loads of effort and quite boring. Frankly, I saw no room for improvement in that animation.
Edit: Wait! Hold that thought. There was one pixel's worth of shakiness in the arms for one frame when they've just finished bending on their first movement.
In all honesty I don't particularly like this new one. It's loose and eased well, but the absence of physics on the run ruined it for me a bit, and having no back joints made the swing at the end look really awkward.