I don't like it when books and songs rhyme one word to itself. I hadn't thought too much about this before, but yeah, bothersome.
For example, the Beyonce song "Irreplaceable." "To the left, everything you own in the box to the left." (Actually, I can kind of forgive this since the second line is just clarifying the first.) But in the chorus, "I could have another you in a minute, Matter of fact, he'll be here in a minute". Really? There wasn't some better lyric that could have been included?
I have to take issue with Goodnight Moon too. There's one passage where you say "Goodnight moon" followed immediately by "Goodnight cow jumping over the moon". It's really the only clumsy part of the book.
Ok, rant done.