Hello.
The center of gravity on your latest isn't too off... as you can see I didn't try to edit that too much, it's okay to be - or appear to be - a bit off balance when you're in an idle animation in a showy fictional martial arts video game. However I feel your still frame right now screams 'I AM DODGING A HIT' why? The torso is leaning to the left (ours) too much, the right arm is in an indecisive flail as if to parry and keep balance, that sort of thing. The head is obstructed and offers no clear visibility, doesn't seem to be looking towards the enemy too. On the anatomy level I felt it looked a bit as if the torso went directly to the legs, but the almighty crotch should not go unrepresented! I made an edit for you. I hope I can help.

I think, though this is up to personal preference, that the legs should however be edited further than my edit, so they rest on a perfect hori plane, as is the tradition with fighting games.