Do you have an iPod or similar audio player? Try this: put your device on shuffle/random, and write down the first 10 tracks that play. Post them in the comments if you’re willing!
What does this collection say about you?
Think about one of your characters. What tracks would play on this person’s device (if they had one)? You can post that list too, if you like.
I hope you find some insight into yourself or your characters. See the comments to read my list and add your own!