I only own one bottle of nail polish, and it's black (Zoya in Raven, to be exact).
To be fair, I grew up in a home where my mother's closet rivaled that of Morticia Addams. My parents passed over the standard pinks and bows and dressed me in edgy, black baby clothes instead. At one point in my life, I listened to a band named Scary Kids Scaring Kids. That said, I've always been a bit more reserved when it comes to my beauty routine, and black nail polish seemed to be a stretch even for me. I'm compulsively low-maintenance and naturally attracted to darker colors, so black is the obvious choice.