There are two things I am obsessed with; clothes and books. New or used, it doesn't matter. I could live in a thrift shop going through the stacks of previously enjoyed clothing. I love it when I get a gift card for Walmart this gives me to go nuts in the ladies section, and it drives my hubby bananas so he retreats to the closest coffee shop and comes to get me later.
As for books, it's the same thing. My books have their own room, and this includes the ones that I wrote. I have fiction self-help and writing reference books. I also have a kindle for e-books and I swear it has its own postal code. My hubby wonders where this obsession with stuff will end. The day they carry me out in a box probably.
I do cull out my collection of books after I have read them except for the self help and reference books. I do keep certain series but the rest get donated. My hubby's big fear is that I will just go out and buy replacement books.