Back in the day, @SilverDarling I worked in a small academic library that still used Dewey. Fiction was shelved in the 800's (literature, as you, but not everyone, I'm sure knows). I worked with LC classification for many years and never did like it much.
About OCD: OH and I are somewhat, but about different things--I couldn't care less whether all my paper money in my wallet faces the same way--in ascending order of denomination, no less; and he doesn't care how the mug handles face or the pots are stacked up. Good thing we're tolerant of each other or there'd be trouble
In retirement now, my library volunteer job @Julieathome is keeping the Mysery and Science Fiction sections in order (in library jargon, we call it shelf-reading) It's so eye-glazing that one can only do it in one-hour shifts. btw I hope you are having a wonderful weekend away.