I collect ores, ingots, dragon bones & scale, hides and skins. I'm level 65 with 1,000,000+ gold - enough armor and weapons to outfit a small city and properties iin every city & hold; am Dragonborn; thane if every hold; the Listener; head of the TG; Harbinger or the Companions; and on and on and on, but I still have this compulsion! What on earth am I ever going to do with all of it! It's not even worth anything. Oh well, I suppose thousands of iron ingots and leather will come in hand some day...
Oh - and alchemy ingredients! I couldn't possible use them all! Chests, barrels, satchels, cabinets, end tables - full! Full! Full! (I didn't even know there was a limit on how much you can store - but there is!).
I need to have a garage sale...