I'm inclined to reread favorite books on a regular basis, but some have passed out of my inclination eventually.
When I was young, I re-read Atlas Shrugged yearly. Been unwilling to crack it for decades, likely never again (same true for the rest of Rand's novels)
I adored Ray Bradbury from about 5th grade on. His intro to "The October Country" stuck with me so much that every fall I'd go digging through boxes of books for it, but somehow reading the whole collection was no longer necessary. I do know that after my husband took a writing workshop with Bradbury at Cal Tech, and reported that Bradbury was an avowed athiest, it gave me a different slant on his writing that that made it less attractive.

Don't want to reread books that were spun out into series. So often, even if the first book is great, each one after it gets weaker and weaker till I get disgusted, even with authors I like very much, like Roger Zelazny's Amber books.

Used to reread Dean Koontz when I needed a mindless spooker. Had a whole big collection, but I think the only one I'd bother to reread of the bunch was the one about the superintelligent Golden Retrievers... the rest went to half price books.

Wonder why I haven't thrown out all sorts of old text books - any chance of a reread of those is slim to not-gonna-happen.

A batch of the above wouldn't qualify, as I had the sense not to read 'em the first time, being willing to believe Cliffnotes and lit. crit.

Joanne in Cleveland (whose overly read copy of The Last Unicorn is out on loan, and who knows if I'll ever see it again)