I really love this thread, it's crammed with style and will to to do things right.
I loved the tatoo works, they're fantastic, I want to make a piece of such one day... the videogame characters also look adorably cute, you're doing a terrific work with that.
About the western piece... Yeah, It's that "thrusting hip" pose. Sometimes it's a bitch because the figure can look unbalanced, like if it's not really well-set on the floor... Your figures have narrow shoulders compared to their feet, making his left leg (her right one in the case of the squaw.) stand too much than desired... And choosing to draw volumes and details like crinkles and stuff quite naturally makes things worse, 'cause it makes it stand out even more.
You've seen my drawings... I tend to overuse that pose, so I'm talking from experience... I think it's too late for trying to make corrections, but I'll leave an ultra-quick sketch 'cause Igottoleavenowseeyoulaterlovebye.