You can never have too many 'little black dresses'. I especially like the casual ones where you can where any day without people asking you, 'why are you so dressed up?' Which, I used to get about every other day by people who never see me dress on a daily basis. (because I don't consider myself 'dressed up')
I recently received this awesome cut out patterned dress from Tidestore. Today was the perfect day to wear it because it actually wasn't extremely chilly out.
Black cut out dress: c/o Tidestore (which is only 9 freaking dollars!)