This year Spotify's summary of the music you listened to over the year is called Spotify Wrapped. By far my favourite feature is them creating a playlist called "Your Top Songs of 2018" as part of it. When you've listened to thousands of songs, having an automated way of surfacing the songs that you enjoyed the most, is pretty sweet!
One thing that is a bit funny is that the "artist" that comes in third in terms of how much I listened to them, is Sleep Baby Sleep. Yes, in the first half of the year there has been a lot of music played to get the baby (now toddler) to sleep.