Lesson 10: Pandora has very interesting reasons for picking music

So, instead of listening to my iTunes today I decided to use handy dandy Pandora and when I got bored I checked the "why is this song playing?" Turns out there are some interesting reasons, I didn't know they considered, such as: demanding instrumental part writing, extensive vamping, a minor key tonality, major key tonality, and (what I found the most amusing) a 12/8 time signature. I have to say, they're all legit reasons, but I still find them amusing.