With the release a few months ago of 1.4, I think it is safe to say that Banshee has become my favorite music player. Banshee is a jukebox (like ITunes) style player which allows users to organize their music however they wish (I prefer by band). I have become really interested in smart playlists and used them to organize my unlistened podcasts in a clear and sufficient manner.
The biggest step forward in 1.4, however, is the ability to refresh your music library manually. When I remove already listened to podcasts or update tags I want to be able to quickly refresh my library. Banshee allows the user to do just that now.