Every time someone tells me they're writing a children's book, my spidey senses go off--evvvveryone who has seen a baby assumes they're easy to write and make which like...no man.
It's always hella dense with text too and it's like--this is for BABIES, man. BABIES.
That and when I'm like "no publisher will accept your manuscript if you are an unpublished author who's already "found" an illustrator. Your art director will find your illustrator." and they're like...yeah but won't the art help it stand out? and it's like "No! I literally majored in this, that's now how this works!"
My weirdest commission though was a hella great guy, and it was a masssive oil painting of him shirtless holding his mother's dog. It hangs above her fireplace.