I have a love/hate thing going on with Spotify. When I hear a song I like, I want to add it to my List so I keep hearing it. Sometimes I'm given the option of "Your Library", sometimes it's "Your Favorites" and sometimes it's "Your Play List". Is there a difference? There are a LOT of "Play" buttons on its interface. Often very hard to figure out which ones do what. It has the most literal Search engine. Maybe I'm just spoiled by Google, but it can't make any kind of "sounds like" guesses. Do artists/songs fall off? There's an artist's song that I listened to a lot and now doesn't come up. (Gina Clowes "Puppet Show"). If so, this is alarming. How do I keep music in perpetuity? Do I need to buy an iPod or something?