This is an idea for a minor DLC or maybe just even for a patch.
On my character, i liberated Skyrim from the Imperial Army and i killed Alduin, now my character has been wondering around the world, doing minor jobs here and there wile pondering over life's mysteries... And then he came up with an idea, he is gonna open a museum

So the idea is to have a building, with lots and lots of weapon rackets, armory dummies and display cases, where you can store your most precious items you have. So for me for example my characters collection is;
Sanguines Rose
Mehrunez Razor
Mythic Dawn robe and book collection
Wuuthraad axe
Dragonbane
1x Dragon Priest mask

Just to be able to expand this collection and have it on walls and such would be amazing I know we get a fair few ammount of things with the Hearthfire addon which was brilliant.

Maybe even expand this idea to actually let the character open a museum, and the more rare pieces of gear he has on display, the more visitors comes (Just random NPC's). A sort of extra income? And ofc the Jarl of whatever hold you wanna open up the museum will charge you XX ammount of gold now and then to let you rent this museum?

What you guys think?

Though it would be nice to see something like this in game like they did in Morrowind, i don't really see it being a good DLC............. Nice to see new ideas though