France 24 just had a segment on why people wish to learn French. My favorite answer was from a woman who said that she was fascinated by all of the strikes that happen in France! 
I wanted to work as an interpreter for the United Nations from a young age so that was my motivation to learn the languages I speak. I also work in rural Vietnam and learning Vietnamese was essential to be able to do my job. Very boring compared to the strikes!
do you have any unusual reasons for learning a different language? Or did you just learn because it was part of school curriculum or you wanted to order food? Or some other reason?