There's that specific moment on a cold evening when you've just sat down, the show is loading, and you realize you need something over your legs right now, not in two minutes once you've found it in a closet. The blankets that live folded over the back of a couch or chair, ready for that exact second, are the ones that get used. Everything else ends up as a photo prop.
Size trips people up more than they expect. A blanket that looks generous folded in a store shrinks the moment you unfold it over an actual body on an actual couch, so measure the couch and add at least two feet on each side if you want real coverage for two people, not just a lap warmer for one. For a bed, treat it as a layer rather than the main event, something draped across the foot or folded at the end, and a queen bed wants a blanket closer to a full throw's width if you want it to hang properly rather than looking like a dish towel someone left behind. The common mistake is buying one blanket to do every job, bed and couch and picnic, and ending up with something so compromised in size it does none of them well.
A good blanket sits easily with whatever is already in the room, a wool one over a leather chair, a waffle weave knotted at the end of a bed with plain sheets, something with texture doing the job color usually gets asked to do in a small space. Where it falls short is anywhere that needs real warmth without weight, a drafty room or a cold sleeper wants a proper weighted or insulated option, not a decorative throw that looks right over the couch but gets kicked off within ten minutes because it's all show and no heat. And a cheap acrylic one off a clearance rack will pill within a season, going bobbly and limp in a way no amount of fluffing fixes, while a better cotton or wool blanket softens with washing instead of falling apart.
Care is mostly common sense that people skip anyway: check the label before you throw it in on hot, because wool and some cottons shrink hard and fast, and a blanket that's been through a wash cycle too many times at the wrong temperature ends up a child's size version of itself. Fold it instead of balling it up when it's not in use, that alone adds years to how long it holds its shape, and give it a proper wash every few weeks if it's doing daily duty rather than waiting until it smells like the couch.
Buy the one you'll actually reach for at nine at night, not the one that photographs best folded.