I adore nail polish. Probably a bit too much, likely in over-reaction after having bitten my nails for most of my life.
At some point my nails grew in a bit thicker, too hard to bite, in other words, and hey, look! I have nails!
It's my new hobby, since I'd rather not wind up buried alive under my piles of junk in my old age. Nail polish is small and easy to store. Plus, with a good polish thinner, it lasts forever, so it's frugal. (Well, not if you own a zillion bottles, but the theory is a good one, right?)