Altough it's a pinup, and the white/lineart background, the overall impact is good. The pose isn't easy to execute as the other critique said, and in details like the right foot it looks well achieved.
Composition: It's good how the wings form an ellipse around the whole Morrigan. And! once we're at it, I feel like if the background lineart wasn't there, I wouldn't mind at all.
Lineart: Great proportions, lovely colored, colored lineart is always eye-catch and I personally like it a lot.
Coloring: Not too mucho to say here, it is great, with colors blended and effects make it look far from just colored, they enhance the light sources and shadows of Morrigan's body. Textures on her wings are also a plus.
Things to improve:
Her left shoulder feels bigger than it should, I know it's in perspective compared to the right one that is pulled back, but still I believe it could be smaller and still look in perspective. Her hair color could be improved as well, with textures or by following the overall color style (with multiplyish effect used on the purple in legs), that would make it less plain. The end of her left foot is a bit off-place, it should be more aligned with the rest of the leg, or not so oriented to the right. Collar bone as said before could be improved too.