I reread favorites of mine on a fairly regular schedule.
Some of them include:
JRR Tolkien's "Lord of the Rings" (once every five years or so)
Stephen King's earlier works (such as Firestarter, The Dead Zone, IT, The Stand, etc.).. usually 1-2 King books a year
Ursula K. LeGuinn's Earthsea works.... usually once a year.
Neil Gaiman's Sandman series... Once a year
Stephen R. Donaldson's Thomas Covenant series... once every 2-3 years