This literally never happens. I normally hate nail polish, but when Dom from Deareaux sent me that prize pack a little while ago it came with a NARS nail polish that I just couldn't ignore! The fact that I started rewatching Sailor Moon (because I am awesome) and she gets nail polish every time she transforms may have helped too. The shade is called Disco Inferno and it is a shimmery silver that has a purple and green sort of shift to it, depending on the light.
I don't ever do this, so I'm not sure what else to say about the polish. I think it is pretty and I have managed to not pick it all off yet, even though I can totally feel it on my nails (which is why I never wear nail polish)! I still hate the feeling of nail polish though, so I can't promise that I will be doing this very often.