The eyes are absolutely gorgeous and the skin is so beautiful, the texture is amazing. I really appreciate the hair as well, the flyaways are so detailed. The only thing I would suggest is making the piercings on her lips not so perfect? I'm not sure how to explain but they seem almost too clean and shiny to be around her mouth. It may just be me though.
Sick, you are really getting down right ridiculous man. You've always been amazing but this is really showing your improvement. The detail on the focus area is accentuated by your suggestion of detail in the rest of the picture and the colors play wonderfully with each other. Your brush is getting Sicker.
Haha, well it's to be expected in a one night session. I find that most errors in portrait-making are made when you measure out the initial proportions. The sneaky part is that usually you're close enough not to notice until it's too late.