Hoarding is half the fun...
My main problem is that my Sony Reader PRS-500 is a poor hoarding device.
I have gigabytes of books begging to be hoarded on my 8 GB memory stick but at best the PRS-500 can hoard 2 GB of bibliophilic goodness before the device becomes virtually unusable. It's menu functionality is limited with respect to the serious hoarder - one can only hope the new PRS-700 has corrected this serious issue.
My calls for a firmware upgrade to allow me to hoard yet more books on my Sony Reader have gone unanswered..