I love my playlists. I've added to my starred playlist for about two years now, and I always wonder what I'd do if my playlists were somehow wiped. So how about something that would rest my mind, the ability to back up your playlists to say, a text file containing all your songs, and then you can import your playlist if it somehow goes missing! This would be an ace feature as I see some people are having issues with duplicate accounts and their playlists being wiped.
This would also making sharing playlists between friends even easier!
TL;DR: Let us export our playlists to a text file, and then import our playlists whenever we like.