in my estimation, this is one of the only shots I've seen so far that truly understands the value of negative space...as I understand it—that the negative space is supposed to draw your attention prior to the positve space. Well done. It get's my vote.
I liked the positive /negative on this photo. Would have liked more without the scrub or bush in foreground. Not sure but if a silouette of a person leaning on rock could have been accomplished or even a siloette of person to show magnitude or size of rock. I like the shot though!