The Act of Rereading!

It's a rare thing if I re-read a book.
I have my reasons, but if you see that I'm re-reading a book, then you know it has to be VERY awesome.
There has only been 6 books that I've re-read in all of my lifetime. The first four books are the Twilight Saga, in which I read the series 3 times. The first time reading it, the series took me a week to read. The second time, it took me two days, and the third time I read it, I cranked out all books in ONE DAY. I haven't picked up the books since.
The other two books I've read were more recently. Last summer, I re-read the first book in the Hunger Games, out of boredom, and because I adored the series. This past week, I received my signed copy of The Fault In Our Stars, and I was searching for a quote that I could not find on the Internet. I knew it was at the beginning, so I figured if I read a couple chapters, I would find it. Well let's just say that I found it, but continued reading.
Anyways, I'm not the type of person to re-read books. If you look at my to-read list on Goodreads, it's over 2,000 books. Clearly, I could be reading other books, instead of reading books I have already read and enjoyed! That is the main reason why I don't re-read books!
Also, I retain information very easily, and if you ask me about any book I've read in the past two years, I could probably describe everything about it to you. Generally people re-read books when they need to refresh their memory, but I don't need to do that because I pretty much remember everything that happened in it!
The only reason why I would refresh my memory, is if I absolutely loved the book's writing style. The reason why I read The Twilight Saga was NOT because of this reason. When I re-read that series three times, it was because I didn't know very many other books. The reason why I re-read the Hunger Games and the Fault In Our Stars is because I simply adore the writing style and want to replenish my mind with how it was written! 
So here's a question for you: do you generally re-read books? If you do, why? If you don't read them, give your reason as well and state which books you HAVE re-read!