I voted for Babies don't sleep, because while I played this quest I had my own two-year old who wasn't sleeping through the night either.
Outside of this personal connection, I did like the story with the Item Check girl. I chose to lead her on rather than disappoint her.
How many times has there been a paper/toilet sidequest? I remember it from Majora's Mask, but not from any other games. Just wondering if anybody knows if this paper/toilet thing goes deeper than that.