I've been a premium member for about 5 years now and I really struggle to choose it over (free with ads) youtube while playing music because the interface is just so dull.
I'd love to be able to access themes to use and skins to add like wallpaper patterns of whatever (like how you can customise in the LINE sms app), having an option to make then upload to a community area where people can upvote/comment would be nice.
Then while actually playing songs it's just so boring, even windows media player from 2001 (17 years ago!) had basic shapes and patterns that would pulsate in time with the music so I'd have thought if you can't get access to official music videos for the platform you could give users some other cool visualisations.
Didn't want to come off too negative but I just feel like it could be so much better than it is.