I listen to a wide range of music and Spotify's recommendations had been really good for me. But more recently they have gotten terrible. It's really annoying and has made the service much less useful.
That's more than can be said for Tidal. My recommendation playlists generally contain tracks and artists I already listen to (sometimes from completely unrelated genres), sprinkled with what seems to be random tracks from the "more like this" section of said artists.
Still not enough to compensate for the shit stream quality and ever increasing price of Spotify though...