It's nine at night, the overhead light is off, and the only thing on in the room is a lamp throwing a warm circle over the couch while the television mutters in the background. That's the moment a living room lamp justifies itself. Overhead lighting gets everybody through dinner and homework, but it does nothing for the hour when you actually want to sit still in a room. A good lamp is the difference between a living room that feels like a waiting area and one that feels like somewhere you'd choose to be.
Where it goes wrong is putting a tall, busy lamp next to an already busy bookshelf or a gallery wall, suddenly the room has three things shouting at once and none of them land. If you've got nothing in the room yet, start with one table lamp near where people actually sit, not one tucked in a corner nobody uses, and a simple floor lamp behind a reading chair if you have one. That's it to start. You can add a second table lamp later once you know how the room behaves at night. The real split between a lamp that lasts and one that ends up at the curb is in the base and the socket, not the shade. Cheap ones have a stamped metal or hollow plastic base that feels light in a way that makes you nervous every time you walk past it, and a cord that starts fraying at the lamp end within a year. A well made one has real weight to the base, a harp and finial that actually screw down tight instead of wobbling, and a switch that clicks instead of grinding. Pick one up and turn it over. If the bottom is covered in a clean felt pad and the wiring entry looks neat, somebody cared. If you can see glue, you're going to be back shopping in eighteen months.
On finish, I've learned to stop overthinking it. Brushed brass, bronze, matte black and plain ceramic in a warm white all sit fine in rooms that have nothing else metal in them, and they age without looking dated the way shiny chrome or a trendy color glaze can. Shades matter more than people give them credit for, a plain linen or paper shade in cream or warm white will flatter a room every time, while a dark or patterned shade looks good in a photo and gloomy in person once the bulb is actually on. Warm bulbs, always, never the blue white ones meant for garages.
Buy the heavier lamp with the duller finish and the plain shade, it will still be lighting your living room long after the trendy one is in a closet somewhere.