For me, its my pile of comics. Self admittedly, I get too many, but I blame that on one thing and one thing only - there are too many comics being published that I (at least think) want to read. Its a good problem to have, and if it fits into the budget, why not?
Why not? Because you end up with a stack like this:
I also had oldies but goodies like the 10 issues of Herc that I got before cancellation, and the DnA-penned New Mutants Fear Itself tie-in (I think the farthest back the unread pile went was the Steve Rogers: Super Soldier miniseries that happened right after Siege). As of now, all I have left is 4 issues of the relaunched S.H.I.E.L.D series by Jonathan Hickman and Dustin Weaver. It feels really good, because some of those books have been on my floor in a stack for like 2 years.
(Plus, now I get to read all the Image books I've held off on!)
So that's that, I sincerely hope I never accumulate that many comics on my floor again. Ever.
Because females can smell that.