I've just noticed an amusing little difference in casual wear between male and female Shepards. The sixth option for male Sheps is a leather N7 jacket and jeans, while the sixth option for female Sheps is a dress.
My Paragon male Shep generally wore one of the uniform options all the time to maintain a "professionalism" pose. With my renegade FemShep, I've been opting more for the N7 hoodie while onboard the Normandy
, then one of the uniform options when I'm on the Citadel (or for interviews with Allers).
Now that I've noticed the dress, she might have to break it out next time she visits Purgatory...