Have you looked Plex’ smart list capabilities? They have some decent flexibility that might get you part of the way there. From a individual track basis, I guess the only choices you have is star ratings and moods, but I don’t think moods are available on the mobile app, if that is important. Star ratings could potentially get you 5 workable playlists, each star represents a different genre, for example. Clunky I know, but it may get you your top 5 genres active or whatever. Star a song and it is added to a smart playlist looking for that number of stars. It seems the genre label is only available at the artist level whereas mood is track level. You could create your own mood labels. I created my own genre label and added it to artists so they were included in a playlist looking for my custom genre. I do like the fact that I can add a song to a regular playlist from the mobile app in Plex whereas iTunes required the computer to sync.
At this point I am only using iTunes for ripping and metadata management. I really do love the smart playlist capabilities of iTunes but this most recent user interface generation is not very good. I really miss the iTunes DJ playlist. I don’t know that the Apple Music app is going to be any better.
Sorry I really can’t be more help.
