Also, take time to block in the basic values (like sculpting the basic shape of a clay figurine) before you start with the details because it will save you a billion headaches and hours of redrawing in the end.

Jad's idea to make her stance wider is definitely a good way to go. Wide stance is a power stance, assertive, fits the personality you're going for. Chin up as well (though that's kind of moving it into arrogant territory). It's either that or make her look very comfortable and relaxed with where she is and what shes doing. Move her weight onto one leg and bring some curves into the spine.

Sorry, I guess it was just eating at me a little and I couldn't help but write it. There's just so many things I see every day that push sexual objectivity of women (be it games, advertising, art, ...) that I've developed a knee-jerk reaction to seeing it.  It was more referring to the earlier versions where her skirt was so high you could see her underwear.