If you play through the Kasumi: Stolen Memory DLC in Mass Effect 2, you get this little black dress for Shepard to wear around the Normandy afterwards. Thing is, the animation for Shep doesn't change, so she's as tough and broad-shouldered as always (and she still sits with her legs spread-eagled when talking to Garrus). It's awesome.
Personally thought she'd go for something like a nice pair of dress pants and a sexy blouse or something, it cracked me up watching her run around in that dress.
(Which is portrayed excellently here, of course!)