So I see on Unclutter that DSM is considering adding a Hoarding disorder, distinct from obsessive compulsive disorder.

"Persistent difficulty discarding or parting with personal possessions, even those of apparently useless or limited value, due to strong urges to save items, distress, and/or indecision associated with discarding."

Not sure if I understand the diffenrecne, but certainly recognize the impulse…

http://www.dsm5.org/ProposedRevisions/Pages/proposedrevision.aspx?rid=398