I have...books. I bought just about a hundred at the last local book sale. Added to the existing two bookshelves of books "to be read", and that's a few hundred on my "to be read" list. A lot of well-reviewed/award-winning general fiction, nonfiction, and mystery/crime, not so much sf or fantasy as I tend to read those first. I've also been making an effort the past few years to expand my reading outside of fantasy/sci-fi (Scandanavian crime thrillers are generally thumbs up; general mysteries are hit or miss, general fiction likewise, nonfiction is a slog unless it's natural history related or something like 1492 or 1493, which is sitting on the newest "to be read" shelf just above me.) I make lists based on authors I like, authors similar to authors I like (Amazon & Goodreads are helpful for this), New York Times 10 Best of the Year, and similar lists, and use those to guide what I get at the booksale (twice a year, and it's big). Plus Amazon for impulse buys.
Read books are mostly in boxes, although there is a bookshelf or two around with good books. There's probably 10 boxes in the upstairs closet, and more under a bench downstairs. There are comic books (X-Men related) under the guest bed. I had a lot of comics, but did a serious purge a few years back and got rid of a good 20 boxes. I got rid of a lot of books then too. And RPG books.
I've also got a fair collection of mythology/folklore/fairy tales, home design, woodworking, and assorted stuff. Plus National Geographic and a few other magazines.
OK, these photos might be a lot larger than I intended. :/
The top photo is of the books I bought last month (minus those I've read). Ignore the AT-ST walker, the slide box full of markers, the booze, the Star Wars movies at far right, and the magazines (Family Handyman on the left, National Geographic on the right, paint samples, kids music books, and misc stuff in the center.)
Lower photo is the other bookcase in the room. Books to be read on the top shelf, some reference and stuff on the second shelf (I have no idea why the shaving cream is there, I've used an electric razor for 10 years, and only been in this house 5), RPG, reference, and overflow on the third shelf, Design/building/overflow on the fourth shelf, and X-Men collections on the bottom.

