Thought I'd better share
Fiction is in the little bedroom/study, on shelves, by author. Once read, I give them away, apart from a few classics that I've read several times.
The bed is covered with boxes of books, mostly sorted by subject - gardening/cookery/self sufficiency/foraging/wildlife/history.
Main bedroom - shelves and more boxes of recently acquired books - a few for bedtime reading and some "What to do in your garden this month" to remind me (if I remember to look at them.)
Bookcase on the landing has books I value for their rarity or age or sentimental reasons.
Downstairs - a wall of book shelves for non-fiction. I try to shelve them by subject and by author - eg all Geoff Hamilton books are together on a gardening shelf. Most of the travel guide books are being given away as I'm unlikely to be visiting those countries now.
Sometimes, when the weather's bad and I'm "bored" I move the books around into matching size, or colour of cover. Many years ago, I had a shelf of orange Penguin paperbacks
I really need a hobby......................maybe I'll collect seed packets!!