I've always wanted a huge, wood-paneled library: the kind with a ladder that slides around the room and shelves that are twice my height. Not terribly practical in earthquake country, but this is fantasy territory, so the practicality is kind of irrelevant.
Some of the libraries in this slideshow would suit me just fine.
How about you? Do you dream of shelves full of leather-or-pleather-bound hardcovers with deckled edges? Are you plotting to keep your entire library on your Kindle/iPad/Nook/Kobo?