First of all - i think thats portaits - not Fashionphotos...
Why we take Fashionphotos - becorse someone want to sell fashion -
that means - the most important think is the product fashion
if it is an comercial foto - is the product the most important think
the viewer has to say - i want to by the product -
if it is editorial - like for a magazin - the work can be a little bit more artisitic...
for your next shots - work with some reflectors - mayby white linen, paper, mayby a light flash (more light in the eyes)
open the lens - mayby by 2.8 - to 4.5 with unsharp background
but work with some graphical elements in the back
give the photo more deepness
think about a good styling and make up
try to copy one of a good idea - you mayby see in a fashion or women magazine.
See how we working in my backstage site on:
http://www.knmultimedia.com/backstage.htm
Good luck and regards from Tenerife
Klaus