Yeah, I think Proto's correct, particularly about her face - it's a bit manly to me. I think it's her hairline - she's showing a lot of forehead. Adding more hair might make her appear a bit more girly. Her shoulders also seem kind of square. In any case, it's exceptionally well drawn, and is an awesome sprite anyway! Awesome job!

Yeah this is somewhat very cliché, most girls in fight games are "cutie tiny asian idol" style or "american / blondie / SM badass" style. And so I guess I would rather more belong to the 2nd category haha x)

Hopefully, I've not that much breast nor stiff back in reality :)

Well, don't worry, critics are always welcomed when they help me improve, I don't mind if it's a bit harsh ^^

And I guess Prototailz has lot of knowledge about fight stances judging by his comments on this weekly challenge entries, so let it be this way. 

Even nicely done pictures can receive absurd troll comments like the one below mine. For me it's kind of difficult to understand.

 Her face looks quite manly. Also, her arms are pretty far away from the rest of the body, you should have them closer to the torso/face, to protect you. And I think her back is way too straight for a fighting pose, it should be a little curved.

lol nice job :)

 I sure love big boobs