For my contribution, I looked to books that came top-of-mind quickly. Each also represents a connection to my life when I first read the book. So I have my own favorites as a child, my first favorites to read to my kids, and my first favorites as a librarian. There are hundreds of picture books I have loved and do love, but these are the ones that I won't ever give away from my own collection. So don't even ask. I'm going with countdown style with my favorite book listed last. It's also pretty close to the reverse chronological order of the books' publishing years.
What are your favorite picture books?