Hiya,
This is the first time Ive used the critique section so youre entitled to take my comments with a grain of salt!
First glance, I find the nails quite pleasing to look at but, for critique purposes on closer inspection I feel that the white is a little 'too heavy' for the size of the nails.
Looking at your line of light there seems to be a dip in both ring fingers, and the length of white seems marginally inconsistant on some nails.
I do think your smile lines could have been a little, and I do mean a little, deeper but they are nice & neat.
The photo isnt bad but the pose isnt the most flattering. The splayed fingers isnt doing your work any favours.
Hands placed on top of one another, with nails of both hands pointing outwards (fingers almost making a 'v' shape) is more flattering, or one hand lying straight with the other on top at an angle.
I always tell my model to imagine that there is a thin piece of card between both hands, so that she doesnt press her hands down too hard themselves.
There's a nasty colourcast on the picture giving everything an orange appearance & making your whites look 'dirty' ... did you take this in artificial light without a flash?
Id be happy to try & correct that for you if you like, or you might want to use your flash and diffuse by putting a piece of white fabric over it to soften and stop any glare & blow out.
Hth.