Well, I just loaned my copy of The Shining to my nephew, or I’d be re-reading that right now.
I strongly suggest, if you haven’t read it in a while, my second personal favorite, 'Salem’s Lot. No matter how many times I’ve read that particular book, I get nightmares for weeks afterwards. Never stops me from re-reading, though. 
My first favorite has been mentioned already, (The Stand, and I have to completely agree that I consider it his masterpiece.) I wish I could remember who I loaned THAT to, so I could get it back and re-read it, myself.
Also, Misery is great for a second going-over. It is also one of the few I liked on the screen, as well.
I never liked Carrie very much. Yet, it has been a very long time since I read it, so possibly I’d like it much better now that I am older.
One book, though, I can never re-read, and never have, is Pet Sematary. I about lost it when Gage got killed and was barely able to finish the book the first time, it upset me so. Nope, that one definitely will continue to collect dust on my bookshelf. However, my sister has read it so many times, she can quote it verbatim, so you might like to read it again, too.
Not everyone is as big a wuss as I am. 