Black lingerie suits anyone who wants one drawer that works without thinking, the thing you reach for on a Tuesday as easily as a Saturday. It's less kind to anyone who hasn't worked out their actual size yet, because black hides nothing about a gaping cup or a band riding up the back, it just makes the mistake look deliberate. If you're newer to buying your own underwear rather than inheriting a guess from years ago, go and get measured properly first, then come back to black. It rewards people who already know their shape and punishes people who don't.
The difference between a set that lasts and one that's bin material by March is mostly in things you can't see from across a shop floor. Cheap black lace goes grey at the seams after a handful of washes, properly dyed lace keeps its depth because the colour's gone right through the fibre rather than sitting on top of it. Check the gusset is cotton, not just a strip of it stitched on for show, because that's the bit doing the actual work and synthetic against skin all day gets unpleasant fast, especially in summer. Underwires should curve with your ribcage when you hold the bra flat, not spring back straight, and the hooks at the back want to feel solid under your thumb, not like they'll bend the first time you're doing them up one handed behind your back after a long day. I've had a set go through two years of hand washes and still sit exactly where it should, and I've had a "luxury" looking bralette lose its elastic after six weeks because the trim was glued rather than sewn. You can't tell which is which just by looking, you have to get your hands into the seams.
Don't pair a heavily boned or padded black bra with anything backless or very low cut, the straps and wire show through in a way no amount of careful dressing fixes, you need a different shape entirely for that job, not just a different colour. And be honest about when black isn't actually the answer: under anything white or pale, it shows straight through, which sounds obvious until you're halfway out the door in a cream dress wondering why you look like you're wearing a bra on the outside. Nude or a pale colour close to your own skin tone does that job better, every time, no argument.
Next time you're looking, skip the lace first and go straight to the gusset and the hooks, everything else is decoration.