The depth of field in the first is very good. I like what you have done with the lighting in the second, her face and arm lit the way they are, and shadows in the background create a good atmosphere.
These are nice shots.
In my personal opinion the first one is a bit to dark.
On the second the skin is to plastic for me.
The third – lovely, so natural.
Last one – Does not look natural.
Beautiful models BTW. I would love to see more…
Cheers