Ok, silly Question; if I may.  What hair color is preferred in the industry (in the past it was always blonde, yawn!).  I have been a snow bunny blonde, now my natural dirty blonde hair, and would like to try a classy Vargas model style black.  What do you think?

Desired hair color depends upon the desired photos, for example with a mix of models in the same picture I'd rather have different hair colors.  In most cases I wouldn't want one model to have an unusual hair color though, since she would take away visually from the other models.  (Hint if you want to work well with others.)

But speaking as a photographer, light brown hair is easiest to photograph because it stands apart from most backgrounds well.