Mine isn't a specific object, its a library. I've got bookshelves in a corner right now. The holy grail for me would be a library with big windows, one of those spiral staircases, and books all along the walls. There'd be big cozy chairs to read in, and a small table for drinks and snacks. Bottom shelf would be lined with all the books I loved when I was young for my kids to discover. I collect fantasy maps right now because I love seeing how people visualize these worlds. So I'd have big map displays in between book sections with those maps. I go to lots of author events so I'd have little book stands with my signed books or books that are otherwise meaningful to me. And I'd decorate with little tchotchkes I've picked up from traveling. Basically this: http://archive.wired.com/techbiz/people/magazine/16-10/ff_walker
Hey, that's mine! I also have bookshelves in a corner. They are currently overflowing; one of them collapsed under the weight last month. Hmm. I need to upgrade into an old manor house, like Mr. Norrell's. I want to install shelves affixed to the walls -- my parents did that themselves to their bedroom when I was a kid. It was surprisingly not so hard. I also like the idea of framing some of the more interesting fantasy maps. Good post.
I had never heard of Gongshi before. Those are awesome. I enjoyed learning about that. Then Wired threw up a screen whinging about my adblocker and told me to whitelist them or give them a buck. I almost ranted to their support email. Fuck you, Wired. You're a wholly-owned subsidiary of Conde Nast.