A good piece of gold decor should look like it has some weight to it, even when it doesn't. Run a thumb along the edge of a bowl or a candlestick and you want a little resistance, a little cool heft, not the hollow rattle of something that would dent if you set a coffee cup down near it too hard. The best finishes catch light without throwing it back in your face. Flat gold, brushed or antiqued, reads calm. Shiny gold reads like a hotel lobby, and not always in a good way.
In an ordinary room it sits best with things that already have some texture or age to them, worn wood, linen, a plaster wall with a little character. It softens next to matte black or deep green, and it looks genuinely good against cream and off white, which is the combination that shows up in nicer homes more than people give it credit for. One small gold object on a stack of books or next to a plant does more than three scattered around the room trying to look intentional.
Where it goes wrong is next to other metals that are fighting for attention. Chrome, brushed nickel, and gold in the same sightline usually ends up looking like leftover hardware from three different renovations, not a choice. It also struggles in a room that's already busy with pattern, a patterned rug under a patterned couch under a gold anything just reads cluttered. And too much of it in one spot, a gold mirror, gold frames, and a gold lamp all on one wall, starts to look like a showroom rather than a house someone actually lives in.
Scale is where most people trip up, myself included. I measure the shelf or table surface first, then leave at least a third of it empty, because a tight fit makes even a nice piece look like it's being punished. For anything with height, a vase, a candlestick, a small sculpture, I hold a hand up at the spot where it would end and check it doesn't compete with whatever's on the wall above it. Buying the biggest piece you can afford is a mistake I've made more than once, it almost always overwhelms a small table instead of anchoring it.
Over time, real gold finishes wear in a way that's honestly flattering, the high points rub a little lighter, the edges soften, and it starts to look like something that's been touched and lived with rather than something that just arrived. The cheaper painted ones don't age so much as chip, and once they do, there's no fixing it, only replacing it.