So far i've been stockpiling wine, dragon bones, and spell tomes in my Whiterun house.

Rare books is my collecting item of call. I've assembled quite the library so far, in both my Whiterun and Solitude homes.

Gold.

Coins, bars, ore, jewelry... If it's gold, I keep it.

I LOVE GOOOOOOOOOOOOOOOOOOOOOOOLD! I'm from Skyrim, isn't that vierd?

Nirnroot.

Jewelry mostly. I have so much that I can't sell it to vendors cause I would have to travel all over skyrim to do it do I've begun hoarding it. That and quest items that I don't want to use but don't want to sell either.

Everything - I have 11 (or 12?) storage-able containers in my Whiterun house. Each is for a special category, like ingrediants for alchemy, armor, jewelry, clothes, etc...

The only things I don't grab from dungeons are baskets and vases and such lying around. Trying to get one of every weapon and armor.

I have literally been putting everything I have found into draws in my house and only occasionally selling it for money, but I have really tried to collect skooma and moonsugar also there are like 5 decapitated witch's heads on my bed

I been collecting those masks from the Dragon Priests.

gold? lol

My white run house is fully upgraded but, I swears not much more than 5 places to store items in it?
Maybe there is, in spare rooms etc, however I dont like the idea of different items all round the house. What I a really want is a good storage room with a few chests.

What does the Solitude house offer? Im at 20k, dontk now whether to get the 35k and upgrade a solitude house or just go for the 100k achievement on 360 first.

As for items, anything enchanted, the bedside chest is rammed of all things enchanted. If I have jewellery that isnt enchanted I do it myself or sell it.
I suppose I also collect the bones and scales as well, but only because I cant use them yet. Also store my gems.