First of all I'm partial to Saju as I think that she is one of the top models on DA. Her beauty, class, and elegance are sublime. This particular photo shows a serene side to Saju befitting of the theme of yoga and meditation. The natural lighting coming from the right of the picture casts a wonderful shadow on the figure highlighting her svelte and refined figure in a captivating way. I like how the mountains line end at her shoulders accentuating her head in a heavenly manner. The background being slightly out focus adds to the fixation on the focal point of the figure. All in all very well done.
Even though I like you posing like that, I don't think that these exact shots are the best of yours. The lighting isn't good enough, and the pose is a bit skewed. Meybe some editing would've fixed them. But now it's just a good drawing reference.