My addiction: The first step

They say the first step in overcoming an addiction is admitting you have a problem.

Well, I have a problem.

I'm addicted to books.

Here's proof—my rows upon rows, shelves upon shelves of books:

No, those aren't duplicates. I do indeed have that many books, that many bookcases and hiding places.

And no, I've not read them all. Most, but not all. I'm not addicted to reading them, just accumulating them.

I have no idea what the second step is, but I have a feeling it's not gonna be easy.

Today's question:

What is your addiction?