Favorite YA book? How about favorite library?

I hate these favorites questions. I don't play favorites. But I know, as someone who now writes YA, I'm going to run across this question again. So, I'm giving it a try. But it's not definitive.

From the time I could read, which is before I remember but my mother says I was about three, until the time I had to get a job, which I sadly do remember and I was thirteen, I read a book a day. Or more. So, that's about a decade or 3,650 books. I still read a lot, but not that much. If I had but...