Lifetime Plex Pass holder here as well. I use Plex for Movies, TV, and Live TV/DVR, but there are a couple of features that are preventing me from moving to Plex for music as well (which is really unfortunate because I like where Plexamp is going - not perfect but a good start).
More/better track genre capabilities, playlist aggregation (Playlist Presence Filtering Criteria), and better local tag support (ID3 Tag support for ROBUST music library organization) are the three features that I really need to see.
