As someone who colllects…well…a BUNCH of different things, someone’s collection could be given a place of honor, even if it’s otherwise worthless. I mean, you go into a bookstore, and you’ll find books in collecting all kinds of things. I once saw one on barbed wire.
For example, one of my collections is turtles. I have one taxidermied one, as well as glass, ceramic, carved stone, carved wood, woven rattan, cast metal, plastic, textiles and more. Some are purely decorative. Some are toys. Some are pure kitsch, like shirts, hats, plushies, staplers or ash trays.
Now imagine your typical Necromancer Lich King BBEG. Except it turns out he was undead-obsessed from well before his evil ascendancy. So he has a zombie doll, a bunch of little kitschy coffins in various materials, a chalice engraved “World’s Greatest Dead”, etc.