I hate origami due to the plague of a childhood memory. In 8th grade, our Algebra teacher liked to give us what she called "Fun Fridays." Instead of doing math with numbers, something we were fairly capable of at that point, she made us instead do random art assignments or puzzles, such as really confusing origami projects with vague instructions. And we were graded on it. I think we had to make origami pumpkins at halloween. Awful.