Project idea

Ok so i dont really know what i want to do for my project. i would like to do something involving music and how teenagers use it to express themselves. i know when i was in highschool you could tell what mood i was in by what cd i was listening to. i would like try to see if that has evolved at all over the last two decades. if anyone has any ideas as to how i could do this let me know! see you in class!