My listening habits are not fully reflected in the Last.fm yearly summary. I listened to a lot of music that was not scrobbled* such as tracks I heard via SiriusXM, YouTube, the Spotify PlayStation App, actual vinyl records on a turntable (records ain’t dead!) and mobile device apps that do not play well with Last.fm scrobbling.
Top Tracks Scrobbled by Last.fm
*Scrobble: When Last.fm records the music you play via compatible music players (e.g. foobar2000, iTunes, Winamp) or Last.fm apps. The data is sent to your Last.fm account to give you details about your listening habits.