Take for example this bottle of LA Colors Radiation that I found. It looks gorgeous in the bottle.
And then I put it on. I end up using 3 coats, and it looks boring like this. What happened to the pretty color?
So I decide to layer it over black, and OMG is it amazing! The polish completely changes and now I REALLY like it. The best part of all of this: I got it for $1 at a dollar store :)