'Pride & Prejudice' is one of my favourites and I re-read that quite often, probably at least 6 times to date.
'Jane Eyre' is one I've also read about 3 or 4 times.
A more up-to-date one is 'From the Corner of his Eye', a Dean Koontz novel which is so well written; the storyline is gripping, the characters stand out from the page and the ending is really satisfying! I've read that 3 times and am about to read it again.
'The Book Thief' (Marcus Kusak) is a must for re-reading; too much to take in the first time.
There are many children's novels I love to re-read, as well as reading to my grandchildren:
Goodnight Mr Tom, Tom's Midnight Garden, Moondial and Carbonel are great, even if the latter is a little dated, also Alan Garner's 'Weirdstone of Brisingamen'.
I think any book worth its salt stands the test of time and can be read as often as you like. It shouldn't pall and it should entertain every time; you never notice every detail and nuance in just one read.