screenshot of my old save game and all the craps I collected. I put everything in the pawnshop at Balmora. I had too much time then.
Maybe spoilers if you don't want to see all the weapons stuff the game has to offer.

Generally I either make a small storage mod in the Construction Set, but if I can't be bothered, I generally use the house of one of the characters that a quest has you assassinate, (more like walk up to and hack at). I haven't had the opportunity, but is there a limit to the amount of stuff a dead NPC can carry? Because if there isn't, you could simply use a body, not good for display though.

Hmm, well maybe Caius' house, it's not very large, but I've stored assorted junk on his bed and table.

Sorry, no pictures here. Must find some.

Ah me - Morrowind. Those were the days. I used the house belonging to the guy assassinated in Balmora (after disabling the corpse of course and generally tidying the place up). In another game I put mannequins all round the temple canton in Vivec to display every item of clothing and armour available in the game. Bit of a cruncher on the frame rate after a while but quite fun. Such is insanity.

I think for Oblivion, even with SI I could squeeze them into my shack on the waterfront. Well... almost.

Yeah, having all the armour in the game on different mannequins looks really good, be great if I could find a good one that displayed weapons well too. I prefer a sort of warehouse setting, good fps, which makes switching clothes/armour a lot easier.

I usually use the back room in the balmora fighters guild. It has ample storage, but later in the game it gets too small for a petty thief like me.

I usually fill up a house with stuff. The house is either one from a Great House or from the Houses&Apartments mod. If I did not sell 99% of what I loot, I would end up needing to expanding into a second house (or sometimes a third)

Wow I Really Have No Idea How U Got All That Crap On The Table Anytime I Ever Try To Decorate Stuff I End Up With An OverFlow Loot Bag...Granted That Was Always On Xbox But I Assumed The PC Was The Same...But If You Really Want A Great Place To Store Your Abundances Go To The Elder Scroll Source From Game Source And Download Deadrens Manor...I Dunno If Its Technically Frowned On Or Not But I've Personally Tweaked That Pluggin And I Love The Place Now Its Got Rows Of Chests Stacked On Top Of Each Other Barrels All Over A Room Just Full Of Tables For The Style Decorating That You Did In Your Pictures...I Prefer Mine Because Ive Worked Out All The Bugs On My Own But I Still Reeeeally Need Some Textures im Using A Helmet For A Door Since I Have Zero Options And Cant Seem To Find Morrowinds O Texture Folder That It Says They Are In It Seems To Be Hidden From Me...

Y'AI NG'NGAH
YOGH-SOTHOTH
H'EE-L'GEB
F'AI THRODOG
UAAAH

OGTHROD AI'F
GEB'L-EE'H
YOG-SOTHOTH
'NGAH'NG AI'Y
ZHRO

It looks great but I do not have the time or patience to do such as this. I sell almost everything and what I do not sell I just put in chests or on the floor.....its kind of a mess (LIKE MY HOUSE :-) ) but it works.