Deanna Troi, the ship's counselor on Star Trek: The Next Generation, wore an outfit that, as an 11-year old boy, I found fascinating. Both of her assets--her intelligence and interpersonal skills--were regularly exhibited on the show.
What if the plunging neckline that she wore (until Captain Jellico asked her to dress like the officer that she is), was standard in Starfleet uniforms?
This image of unknown origin suggests that the open bodice works for the other senior officers, although Worf's sash gets in the way.
-via Super Punch