OPI Ink is probably one of my favorite polishes of OPI. I love dark nail polishes but sometimes I get bored with plain black and dark colored ones. Since it's summer, I decided to paint my nails with this one since a). I want colored nails but not neon, pastel polishes (they don't look good on my nails/ makes my hands darker), b). OPI Ink is a dark violet polish that has pretty shimmers in it, and c). It's duochrome!! (Or I think it is.) ;)