Just rate your favorite tracks 5 stars and they'll appear in the My Top Rated playlist.
There's no way to do star ratings on an iPhone. I hope the whole rating system is overhauled in iOS 10.
Yes there is. Just click on album art while the song is playing and rate it.
Geez, I feel dumb now. Thank you @mjschabow!
Actually in iOS 10 beta so far there is no Star ratings. You can use Siri but there is no way to see them. Hope the next beta reinstates them.... I hope the whole rating system is overhauled in iOS 10.