I think the same is true of long black trousers. During my extended illness in 2009, I pulled on the same Vogue basic black trousers (from an OOP Wardrobe pattern) every other day to go to the clinic, varying the tops with a very limited enthusiasm, but still the doctor said, "I appreciate it that you dress so nicely." I think that was his shorthand for "not jeans."
But once you have the black skirt, it's time to play.
My daughter's first try at sewing was a Chanel-buttoned knock-off in a lovely deep blue satin using this BurdaEasy pattern. I then made the same skirt in grey stretch cotton and then in brown pleather embossed with bronze roses shown in my original posting below about "What I've sewn." Using a Vogue so OOP, it's more like Out of the Universe, I've made two daytime skirts in tobacco brown and a khaki, both in wool gabardine, and, now, my new favourite, the leopard fur, here on the right:
Would you believe that for me, this leopard fur skirt has become a Wardrobe Basic? You'd think that it's as un-basic as they come. Yet somehow, these days, whenever I'm facing a dark, grey day, have to pick up a loved one at the hospital, or get myself out of the hospital, which is alarmingly frequent of late!, this is a pick-me-up garment. Its so soft! It goes from day to night with a sort of Donatella panache and fits right in with this season's faux fur thing. Along with the black trousers, a black skirt, grey skirt etc., and a wardrobe of turtlenecks and matching tights, the daily "what to wear" for a home office is done for me, and I can concentrate on evening wear and fun-fashion projects.
Which reminds me... it might be time to replace my original black straight skirt....