I made a slightly different take on this: http://likesorter.herokuapp.com/#
It shows me in a table my likes and then allows me to see (in table form) the likes of artists I follow. Being able to sort my tags, plays, and song likes, I get more signals on whether I might actually like the song.
Music discovery is a really tricky problem. It takes roughly a minute each song to know whether I like a song or not. There's almost too many microgenres to keep track of (I like tech house but not trap house). My tastes are eclectic: you'll find cheesy songs right next to the hippest coolest disco funk track. The artists I follow probably have similarly eclectic tastes.