My opinion is that in 2D fighing games. An idle pose should totally express the character's attitude.
Defensiveness, readiness, arrogance, anger, calm and wit can all be conveyed by how the character body parts are configured.
Is it's back up straight? chest forward? confidence. Ar the hands up or down? hand down would seen to radiate inner calmth or overconfidence.
There are many variations.
http://www.youtube.com/watch?v=CtuWNdwZC_sLook at Blanka and how much he is bent forward. With his arms alomst dragging on the ground. It gives him some sort of animalistic appearance. He fights out of anger and confusion. Much like some animals. Whereas Ryu has a more optimal fighting pose. His arms and legs configured to yield the most effecient balance between attacking and defending. There is no unnecessary moving. and no limb really sticks out. He is the balanced warrior.
Zangief does not even bother to cover himself. His arms and hands are wide open. Why? Because he wants to grab people! You can just see that this guy gets his pleasure from dominating the opponent with grabs and throws. This is why he leans forward so much! He can't wait!
Chun-Li's hand are not clutched at all. Her fingertips are softly stretched and the arms move i an soft wave like motion. She is calm. Her power comes from inner Peace. Se knows there is no point in balded fists and instead put her strongest asset forward. Her legs.
So what is your character's attitude?
I point this out because i think your character already has a very strong attitude.
Right now looks sort of wacky like PixelDriver mentioned. I agree this is a good thing.
Think about who this guy is.