Nah, that's not a problem. I would say that THIS is your problem.
Her hair is plastered to her head.
You drew her with lineart hair when there is no lineart. When working in a semi-realistic style, the hair is just not a block of shaped plastic on the head. This is semi-realistic. Your shading screams 'I am trying to do realistic'. Your hair clashes with that. You need flyaways, bits where you can see background, and best of all, hair that is not obviously put in so much gel that it comes to points like that. Break'm up! I mean, seriously, it looks like you erased around her head...
It's by NO means a bad picture. But it basically looks like you painted like you would for lineart...without having linart. The shading isn't smooth enough in places, it's not rough enough in places... it doesn't have the right balance. Her jacket looks great, but it's too smooth compared to her face. Where you have the shiny blue streak in her hair, it looks blended enough but the rest of it, the lines are too bold. The lighting is sexy, but there's blue on the underside of her chin and not really blue anywhere else, where it should be on that side of her jacket as well, and I think also on her left collar. And dare I say it, the background/pose combination doesn't keep my eye in as well as it could. If you had that shown through a window behind her, it might improve the depth of the picture.
Also, her mouth appears to be twisted to the left, but that could be stylistic.
I only shred apart because you asked... anyway, better shading in her chest, improve the hair, maybe add a bit more of the blue lighting and some more to the background to keep the eye in (definately unnecessary). Just break out of the 'coloring lineart' mold and let stuff be looser to make up for the lack of solid blacks, or give her lineart.
Anyway...
On the positive side, really like the eye there... nice blue, pops right out... I looove the shinies on the nose, makes her have so much more depth... she looks a bit flat but that adds a lot, same with the blue on the end of her nose and chin. The mouth is neatly painted, it looks right for what you did... I do adore the lazy city background too. It's not too detailed to be distracting... my critique is just that, as a straight line across, it doesn't really keep my eye in the picture, or on her. Even if you had a few more taller buildings to the left...
Love how you did the jacket too. The jacket is excellent.
I wonder if just a few more blue tones in shading, particularly on her chest and jacket, might be enough to save the picture. And work on the hair, so it doesn't look so 'I colored lineart then removed it'.
Overall, great picture, I couldn't do something that hot.
