What's up Alan? I read the critique from PhotoSIG... first off, my opinion on exposure is this: the exposure's only bad if you're not happy with it. Having said that, the main thing I'd have issues with exposure-wise here is her thong. It's really bright. I think it tries to be the focal point of the image when it really shouldn't be. Considering the mood you're going for, it might've been nice if it was black or something like that.
I think the composition overall is strong, though. Dunno if you do this or not, but one way you can tell for sure your composition is good is to flip the image horizontally (or look at it in a mirror) -- it can sometimes help you spot problem areas after you've been looking at an image at the same orientation for a while. Another thing that's helpful is to Gaussian Blur the image 'til nothing's left but light and shadow (no detail). This is pretty helpful in evaluating the important areas of the image and where your eye is likely to go. Of course, remove the blur when you're through. [img]/ubbthreads/images/graemlins/tongue.gif[/img]
I like how the image is almost split down the diagonal length of it, and her left arm makes a nice almost-perpendicular diagonal to the line created by her leg, butt, and top of the couch. There's lots of diagonals here -- very dynamic (even though she's just sitting.) One thing I might consider doing is burning the very thin vertical strip of light in the top right corner of the image just a bit. In my mind it tries to pull your eye there a little more than it should.
So what am I trying to say? I'm saying that I think the image is strong, but it needs just a little bit more work done to it. I hope it doesn't sound like I'm harpin' on you or anything -- not trying to. [img]/ubbthreads/images/graemlins/grin.gif[/img] And by all means keep experimenting! Maybe one of these days I'll take my own advice. [img]/ubbthreads/images/graemlins/grin.gif[/img]