I don't have a tremendous collection of polish but I do enjoy a good one and I like to have a selection of colors. China Glaze has a newer collection out called the Metro Collection. I picked up Concrete Catwalk, Westside Warrior and Midtown Magic. They are all amazing and only take two coats for full opaque coverage! I don't have the patience for more than two coats so my favorite polishes are two coaters.
Concrete Catwalk - My absolute favorite dark gray cream with a hint of blue. Dries so shiny that it looks like you're wearing a top coat. This is one of my favorite polishes of all time. I've been on the hunt for a gray like this for some time and it was such a welcome addition to my small collection.
Westside Warrior - Amazing green cream with lots of olive. I've been looking for this particular shade of green for a long time. Some have come close, but this particular one is great.
Midtown Magic - Very dark eggplant, almost black at 2 coats, with copper and lime mini glitter. It's kind of a duochrome glitter. This is a super awesome polish. I have so many shades that dry almost black. At one careful coat, this is still a shade between eggplant and burgundy.
Have you tried any polishes in the Metro Collection? Some other polishes I'm looking at are the Smoke & Mirrors Collection from Zoya, among many other lemmings.