ColleenG
When in doubt, follow the fox.
I had one character who hoarded dwarven cups. There were cups everywhere in her home in Solitude. Another character hoarded books. All of them seem to hoard all ores and smithing supplies. One trip from Riften to Riverwood netted 113 pieces of leather--that was a bear-pelt hoarding trip. My current character is a collector of all things odd and one of a kind, like the "Bloody Mugs" and of course, the various bugs in a jar-bee, butterfly, luna moth. She doesn't hoard anything else, she's the first character to sell off everything she gathers.