I'm of the exact same mindset. But I think, on my part, it's sort of for a more snooty reason. I think it sets us apart. Like.. people look at our hands, see the colors, and think "Oh, she's an art student, she must be really really trendy, amazing, talented, and cool." Or something like that....yeah.
sometimes i think that, but most of the time it's simply nice to look down and see the colors, and be reminded of how happy i am when i'm doing whatever it is that caused the stains. it's like a pick-me-up