I think the best aspect is the little details that make her more alive and active in the painting.
Resting her head against her left arm, holding the Dagger of Time in the other, and playing with her skirt with her feet; there's just a lot of energy coming off from her that makes the painting that much more than just another pinup.
P.S. I'm glad I suggested the arms be moved outward like this over on Patreon. It reminds me how the smallest thing I say can make this big a difference at times