I avoided sequin skirts for years because I had it filed next to fancy dress in my head, something you wore once to a work do and never again. What changed was being handed one at the end of a long, grey week of wedding bouquets and realising a skirt that catches the light is just a nice thing to put your legs into on a Tuesday, no occasion required.
The sequins that are stitched onto a mesh or jersey backing move well and keep their shine for months, the ones glued onto a flimsier base start shedding little discs into your bag within a few wears, and you'll know which you've got within the first wash. Hand wash or a gentle cold cycle in a bag, never tumble dry, and hang it rather than fold it so the rows don't crease into odd ridges. Mine has been balled up at the bottom of an overnight bag more than once and come out needing nothing more than a shake, which is more than I can say for most of what I own.
Before you buy, run your hand over the whole thing, not just the bit on the hanger, because a weak patch near the zip or a seam that's been sewn through the sequins rather than around them will be the first place it goes. Check the lining, a good one stops the sequins scratching the back of your thighs on a long sit down, and check the waistband sits flat rather than digging in, since sequin fabric doesn't have much give in it. Look at the hem too. A hem that's just been glued rather than stitched will start curling within a season, and you'll be picking at it on a bus wondering why you bothered.
What it doesn't want near it is anything else trying to say something, so leave the statement earring and the bold print top at home and let the skirt be the one thing doing the shouting. It also doesn't love friction, so a rough wool coat worn open over it all evening will leave little scuffed patches by the end of the night, and tights with any texture tend to catch on it in a way that's annoying rather than disastrous. A plain top, a flat shoe or a low heel, and you've nothing competing with it.
The pleasure of a good one is in the sound, honestly, the soft shifting noise it makes when you walk, which is a strange thing to love about a piece of clothing but I do, every single time.