You can tell from the doorway which desk is which. A good one sits there looking like it was built for that corner, legs steady, surface clear enough to actually use, maybe a stack of books and a lamp doing their job without a fight. A bad one is a slab of particleboard wobbling under a laptop, with cords spilling out the back like it lost an argument with itself. I had one of those for two years before I admitted the wobble wasn't character, it was just a cheap desk.
A desk has to sit well with the room it's in, not just the task it's for, which is the part people forget. In a bedroom that doubles as an office, you want something that reads more like furniture than equipment, a warm wood tone or a painted finish that talks to the dresser instead of looking like it rolled out of a supply closet. In a living room corner, it needs to hold its own near a sofa and a rug without turning the whole space into a cubicle. Measuring matters more than people think. Pull the desk out from the wall at least enough to roll a chair back comfortably, usually three feet minimum behind it, and measure the width against the actual wall space, not the gap you're imagining in your head. The classic mistake is buying a desk sized for the showroom floor, then discovering it eats the whole room and blocks a door swing. When you're shopping or unboxing, check the drawers slide without jamming, check the surface is actually flat and not a half inch of warp waiting to happen, and check the cable management grommets exist if you care about that, because retrofitting a hole into a finished desktop is not a weekend project. Over the years, a solid wood or well veneered top will take scuffs and the occasional coffee ring without falling apart, but you want to wipe spills fast and use a coaster, obviously, and keep it out of direct sun if the finish is painted, because one summer by a window and that cheerful color fades to something sadder. My mother's beige desk has survived twenty years purely by being too boring to notice. Mine gets touched up every couple of years and I don't mind.
Next to it, I'd put a chair with some personality, not just ergonomic beige, and a lamp with a warm bulb, because overhead light makes even a great desk look like a waiting room.