A Wrinkle in Time and The Giver are my 2 most favorite books.
Surprising, since I ordinarily dislike sci-fi. A Wrinkle in Time won the Newberry when I was in 6th grade and when I was teaching, it still was one of the most checked out books in my classroom library.
I remember feeling the same way when I read the Giver... I could not put it down and distinctly remembering saying out loud. "This is going to win the Newberry Award."