I tend to put different tipes of equipment in different chest. A chest for stee, a chest for daedric... and of course books.
I've seen a lot of house mods do that, designated chests for every specific type of armor and weapon. I don't really understand why. I've never been like "Oh! I need a Mithril Cuirass!" when I'm like level 30. I could see keeping a chest for Daedric Armor alone in case you wanted to enchant it with something different or something like that, but what use is a full set of Mithril or Leather? Why have chests set aside for that when not only are they for much lower levels, but they're light armor. I'm not sure I understand that type of organization for something I'm never going to use or even look at. I'd understand if you placed all pieces of equipment on display so it's a nice little showcase or something, but if they're just sitting in a chest...I don't get it.
My Skingraad house is clad in the finest rare items as well. It was fun placing items like the unique painting I had made for me in Chorrol there
Yes! I loved the Reward Painting. I hope more things are like that in Skyrim, existing solely for the purpose of decorating your house. I always love decorating my house. I spent a lot of time doing so in Oblivion on various different characters.