About the only suggestions I would make would be to perhaps crop a little closer on images like 2, 3, and 4, and it appears you might be saving your JPEGs at too low a quality setting. There seems to be a lot of artifacts in the images from too much compression, especially in 3 and 4. I save all of my images at 70-80 percent quality when using PS CS2's Save for Web feature.
As far as posing, the model's left hand in 4 looks a bit unnatural or uncomfortable; in 3, her right arm is straight down and again looks unnatural to me. I love the posing in 1 and 2, but would like to see a tighter crop on 2, perhaps just below her butt.
I like 1 and 5 best; 1 has a great feel and look and 5 has a cool style to it.
Again, cool set! Looking forward to seeing more.