Dropping by to recommend a new biography called The Art Thief, by Michael Finkel.
It's a book about Stephane Breitwieser, an obsessive thief who over the course of his career pulled off more than 200 heists and stole an estimated 2 billion, with a B, in artwork, sculptures, antique instruments, weaponry and so on.
The most interesting part is that he kept it all -- he was building up what he hoped would be the greatest collection of art in private hands in modern times.
So, you know -- collecting, obsessions, perhaps a borderline hoarding disorder...nothing that I or possibly anyone else here can identify with, I'm sure!