Having a toddler keeps you humble.
For example, M was shaving last weekend and Will (who is usually still sleeping when M gets ready for work) toddled into the bathroom, took one look at his shaving-cream-covered Daddy and said excitedly, "Santa!"
But M doesn't get all of the fun. Yesterday, Will and I were snuggling in bed and reading books, and I was rubbing his hair with my hand. He reached up and started petting my cheek and said, "Pretty." My heart about melted. . . until about two seconds later, when our little dog climbed in for a snuggle. Will started petting his head and said, "Pretty."