Hey Masked! First off I want to say that I like these a lot. They have a lot of character, and in general I think your pixel skills are pretty solid. To any veteran pixel artist or animator, however, your animations definitely come off mainly as LAZY, and secondly MECHANICAL. I think these are pretty intertwined though, a lot of the time mechanical animations are really just a symptom of laziness. And, really laziness here can also be like Maniacal Deadlines or other such things.
What I'm trying (and likely failing) to say is that you are repeating or re-using too much of the art from your basic pose. It is going to be essentially impossible to finish imbuing your animations with character and personality if you only do little vertical or horizontal shifts for the most part. You need to man up, get your balls out of your purse, and go ahead and redraw each frame of the animation fresh! You clearly have some character design or traditional art skills, and I have no doubt that you would do a really fantastic job if you just buckled down and properly tweened your frames, and worked on your extreme poses a bit.
I would absolutely disregard the comments about the animation being too busy or too extreme, and just work on adding weight and power to the existing style (which means drawing each frame!) This is already quality work, but it will require a little more of your time in order to really excel!
