Your newest was better daan, but make the following: make a 50 frame animation drawing circles, make them the most equal as possible to the head from the past frame.
Then you should be fine, and try not resizing too much your animations.
E: The big 20th post guys! xD
I think I'm not a beginner here, look.
http://pivotup.com/files/z7cx0v83.gif
PS: As for the punches, it's not uneasing, it's my style, which is heavyspaced. :3
Visit my dA too and watch me: timetoperish.deviantart.com
My first heavyspaced animation btw:
http://pivotup.com/files/bd6nwti0.gif