Well thank God you didn't take the angle from lower down! Still her body composition (head vs legs size) would seem to indicate even a higher angle to be more appropriate. How about the reflection, you didn't want one?
I really enjoy these 'city window/vegas-type' themes. Don't get me wrong, I jump for boobs. But, the composition in this particular theme becomes more of an art appreciation for me rather than a, "damn that ass is hot."
That's why I don't understand the complaints on this site about porn vs. art.
What defines porn?
In my own privacy I can make any of the nudity posted on this site porn.