Thinking back on what my now 3-year-old's favorite baby books were, she liked books with big, bright, colorful pictures, books with Mommies and Daddies interacting with babies, and books with animals. I know, that covers most baby books, but here are a few of our favorites (all available in the form of board books):
Baby Dance, by Ann Taylor, illustrated by Marjorie Van Heerden. In a re-working of the lyrics to "Hush Little Baby", a daddy dances with his baby girl, while Mama gets a little sleep.
One Sleepy Baby, by Pamela Levine, illustrated by Stephanie
Milanowski. Baby goes through his (her?) predictable bedtime routine with Daddy counting 1-10 each step of the way. "One sleepy baby, two tired eyes, three bedtime stories, a special lullaby..."
Who Are You?, by Stella Blackstone, illustrated Debbie Harter. This one is a real page-turner and invites interaction with your baby, as the question, "Who are you?" is posed on one page with a visual clue, and then answered on the next with the partial illustration completed. I love the illustrators style - bright, geometric, and full of energy. This author/illustrator team has published many more books that are just as much fun to read.
Hug, by Jez Alborough. Baby chimp, Bobo, sees different animal pairs hugging, and realizes

how much he wants a hug from his Mommy too. With the help of the other animals, he finds her and gets his hug. Another good interactive book, because it has only the one word in it, "hug". It's more like having a conversation with your baby about what is happening to little Bobo. This author has created a few other excellent one-word books about Bobo and his Mommy, too, like "Yes", and "Tall".