Thinking About Picture Books

As I mentioned before, this semester I am taking a class on writing children's picture books. Part of the requirements for the class is to read and review 25 picture books throughout the course of the semester. I must admit that I am not at all up to date on recent picture books. (I looked up the Caldecott Medal Winners online and discovered that the most recent of them I remember was The Polar Express, which was published in 1986! That makes me feel so old.) So, I am asking the help of my loyal reader(s). Leave me a comment stating your favorite children's picture books, past or present. If I can find them, I will read them. Thanks!