Well, I'm not in the habit of pretending to be other people... or at least not assuming what their thoughts might... OK, even I couldn't make it through that sentence. I'm very much in the habit of imagining what other people think, it's just a matter of whether or not I care.
In the case of my bookshelves and their contents, it depends on the bookcase. Our downstairs by-the-telly case contains my small non-fiction collection and a smattering of general fiction & mysteries. One book in particular garners a lot of attention, and I will admit that's why I put it there. I haven't read it yet, but considering there are about 100 books on my shelves at any given time which haven't been given even a perusal yet, this means little in the grand scope of my reading habits.
One shelving unit upstairs, which acts as an additional headboard/room divider, contains more non-fiction (most of these related to 'the biz,' writing and how to keep hold of money), all my sheet music and instructional piano materials, a gothic-horror section, an historical fiction section, and my American Lit section... with a topper of myths, fairytales and huge anthologies.
The final bookshelf, my favorite shelf in terms of placement and scope, contains many, many books divided by subject per shelf. Top shelf is theatre, poetry, journals and spill from the shelf below which is... British Literature. Below that, at eye-level-for-my-midget-self, sit every copy of Dracula I own plus research books, related vampire novels, etc. Next is the King family shelf: Uncle Stevie, Tabby, Joe and Owen. Down one more, at rugrat level, are my youth novels (the entire Harry Potter & Lemony Snicket series, plus half a dozen Roald Dahl books and the Inkheart trilogy included). Bottoming out in the best way, the last shelf holds my Tolkien & Jasper Fforde collections, along with gothic mysteries/adventures by Louis Bayard, Matthew Pearl, Ellis Peters and Arturo Perez-Reverte.
I think 'eclectic' and 'voracious' are choice terms for my shelves on first glance. Anyone who pays particular attention will notice a trend towards darker, gothic, macabre fiction (hello Dracula and King family shelves), but not slasher-fic. It's also a collection of books for book lovers with a slant towards historical and fantasy fiction -- but not high-fantasy. There's a lot of epic/series collections included as well.
So what would other people think? Generally?
This bitch has a shit ton of books.
And they'd be right.