Hey:-)
i need help on the following picture i shot and retouched. I think something is missing to let it look professional or really good. But i cant figure out what it is. Perhaps global contrast or colour?  I have big problems on skintones due to my dyschromatopsia;-) thank you very much! regards jan

I think you did a pretty good job overall!

I only have a few comments regarding the image.

I think the hair looks a bit overworked and verges on unrealistic. 

Also the skin color initially seemed a bit off to me but then I read your entire post, so that's a bit understandable as well.  I think the skin could use a tad bit of warmth.  There just seems to be a bit of a greenish cast to the image. 

Also I think it could use just a tiny bit of contrast just to maybe make it pop a bit.  The shadows seem a bit soft.

Hey :-)
thank you for your reply!
I would try to fix the green tint by using a selective- colour adjustment layer and pushing the greens to yellow.
For the contrast, curves?! Would that be your way too? iam very bad when it comes to colours;-)
Thanks!
Jan