not your average LBD

I was finally wrapping up switching out my winter wardrobe with my summer one and realized that I only have wintry little black dresses. And of course I am now thinking that I need one for the summer months too! So if price was of no object I think these would be the ones I would add to my closet:

(via marni, tibi, marc jacobs,)
Love that either from embellishments, materials or textures that these dresses are anything but the typical LBD. I think when it came down to it the Marni dress would be the one coming home with me. What are your little black dress requirements?