I have a Champion (someone finally lost their foot, so a crutch was presented, and they were labelled champion. They lost it to a unicorn) who has demanded an iron cabinet in his room. No worries, melted down at least 20 iron anvils from the caravan by now, so I just made an iron cabinet and put it in his room. The demand remained up there though, so I absentmindedly made a second one, and put it in his bedroom too, then realised what I'd done. I'm so happy it's a demand I can fill...
My two dukes, their two consorts, and my two duchesses, and their two consorts, are harder to fulfill though. They love everything from figurines to quivers, and the fortress now has more than forty quivers in bins in the leatherworking area, due to the fact that they get demanded, then no one is allowed to sell the damn things, then they get demanded again. I've made a half dozen sets of leather armour, when the two branches of the military are all decked out in bronze and iron, so that's for no reason as well. I've got a lot -A LOT- of earrings, as no one will let me sell the goddamn things, but they keep mandating things like bracelets, so I have to keep making trade goods for the bracelets, and thus end up with bins and bins of things I'm not allowed to sell. I'm seriously considering building my first ever atom smasher. I've never ever made one, and had intended never to start, but the sheer number of useless trinkets I have been making. It would have been different if I had been allowed to choose one of these nobles myself, but they all were chosen by the game.
And don't even get me started on Mayor-of-Traction Benches. I now have four traction benches in the mayors tomb, as the hospitals are full. I am tempted to find a way for the mayor to USE said traction benches. Possibly permanently.
The worst noble, though, wasn't even one of these. It was a bloke who wanted me to make anvils. On a map with no iron. It was so damn frustrating... I wanted an anvil, and the metals, as much as he did, but we were on a gold rich, iron poor location. Bastard should have been enjoying being King Midas, but no. Eventually he was locked (first with a gold door, then a gold built wall) into his office, which was filled with gold statues, gold tables, and gold chairs (not to mention gold containers) and that was how I discovered he was a vampire, as he lived in there, safe and isolated, for years. The fort eventually died of water pressure issues, when I was learning how not to make a well. Yay.