I took part in Mr X Stitch's "Black" swap a couple of months ago, this is the piece I made for Sister Twisty:
This really tested my french knot abilities and involved much swearing. It was a really hard topic to decide on as it was so wide ranging. I love the background fabric although the photo makes it look a bit odd.
Related blog post: http://www.unexpectedkitty.co.uk/2014/07/fffof-black-swap-part-one.html
(Unexpected Kitty is the name I do my non-monstery crafting under)