There is a point, however, where choice borders bad judgement. Although the stance might be your choice, it's rather hard to understand. I don't get why her head is tilted, it looks like she is shaking water out of her ear. If she was talking to someone, which portraits usually suggest, i don't think her head would be facing sideways/theground. Her arm's position is also a bit amiss. If it is supposed to suggest she is holding something, you may want to incorperate it in the piece, otherwise, i'd suggest that she have a more idle-looking stance. she just looks awkward.
in the sprite she doesn't look comfortable in her position, almost like she is popping a squat. I think the feet should be placed farther apart. not too sure.