I don't know if I've ever written a critique before, so I hope it isn't terrible! I know I always appreciate it when someone takes the time to share their thoughts about my artwork, so here goes nothing!
First of all, I like the "vision" of this image. You've used the rule of thirds very nicely in this -- my eye is immediately drawn to her face and hand. Cropping a scene with a fair amount of "blank" space (background/sky) is something that not everyone does well. Your image is nicely balanced! If you had cut out any of the background, it would start to look cluttered -- but you've neatly avoided anything of the kind. There's also a nice dramatic flare about this. She's very striking and obviously means business! You've chosen a group of props, scenery, and clothing to convey your vision. The only reason that I scored "originality" lowest is because elves with magical effects are pretty popular.
I like that she's got a punk flare, though! Show me why she's got that awesome blob of magic and I'd be really intrigued. Maybe a reflection in that water or a dark shadow looming from outside the scene?
I like the mood of the image. I think I'd like it better if there was slightly different lighting. The drama of the scene would be increased if you focused the light solely on your figure. The scenery is complimentary to the figure, but not critically important to the image as a whole. I'll admit to being a "dark and moody" kind of gal, so perhaps I'm biased, but I'd love to see this image with very little background light. Turn down the ambient values on the environment sphere and drop the intensity of any image-based lights. (If this is DS, that means UberEnvironment, in Poser it would be a Diffuse IBL.) If you do that, any of the overly bright spots on your figure will fade to perfection. The amount of specular lighting is perfect for the scene, so if you have specular-only lights, keep them just the way they are. And I'd REALLY like to see a deep blue point light coming from that magic effect. I'd use a linear point light with a very low falloff (maybe 100 or so?) Just enough to add color to her face and hand.
And last but not least, the technical stuff: Overall, this is a very solid render. No pokethrough, nice selection of materials, no grain or blurriness at all. There's a little too much light on her face and forearm, making it just a tad washed out. That's a super easy fix, though. And I like the idea of her pose, but something about her upper body seems a little awkward. (Maybe she has one of those evil school photographers yelling at her to sit funny? I think I still have nightmares about them yelling "Chin up! Eyes here! No, drop that shoulder!") And, again this is my personal preference, but I think this would be magnificent if you used some depth-of-field here. Put HER narrowly into focus and let us imagine the rest. If a render is like a photograph, then this one would be greatly enhanced with a lower F-stop.
Shew! Okay, I hope I haven't in any way offended you. I really enjoyed looking at your gallery! Not that I'm an expert by any means, but I think you have good instincts. I look forward to seeing you develop your skills!