I know that you are able to have music in your homes already, but you don't really get a choice with the sort of music. I think it will be cool if you can add your own music.

For example;

If you have a song on your computer, you should be able to upload it to the music player and play it

I think this idea is great, especially for events, parties, hangouts, etc... Think how much better events and auctions or hangouts can be with your own music! I support this idea as long as the lag doesn't upload with it.