I have some fabulous, out of the ordinary grays for you! First is Shades by Barielle, U-Concrete-Me. This is a mere two coats of gloriousness! I adore this color, much more than I originally anticipated. It has a hint of cool blueness, just barely, which keeps me interested and makes it more than just gray. Unfortunately, I only captured one decent picture!
Savina Black Pearl. Three coats.
I found this gem in a Nordstrom outlet store. It is so superb.
The pictures do not do it justice. It is much more flashy, vivid and duo-chromey in real life!!
It has a really nice, strong, teal/purple flash. There is also some green and pink going on. I know this would be even more stunning over black (I tried it that way initially, but had some bubble issues and had to scrap it).