I often listen to half an album, pause, listen to something else, and then come back and listen to the end of the album.
So far I've been using the stars as a read/unread marker and it does a good job, even though it wasn't made for this.
But it's not convenient to star or unstar a song every time you listen to it. What I would appreciate is the possibility to star/unstar multiple following songs at once, with a short drag and drop in the stars column. It shouldn't be too difficult to develop.