If you like them, then wear them. Personally, I never wear white hose, especially popcorn hose, when I'm piping or otherwise.
Any particular reason why? Is it a comfort issue?
No, I don't like the way they look. I strongly suspect that the only reason white socks are considered fashionable is because that's what kilt rentals and pipe bands use because they're cheap, so that's what many people are accustomed to seeing. I greatly prefer kilt hose in a color that compliments my tartan, or when going formal, Argyll or diced hose. I think that white socks with a black PC, waistcoat, & bow tie and white tux shirt gives an overall effect rather suggestive of a penguin.