I&#x27;ve long wondered about other psychological favtors that come into play as well. I wonder if each time I give a song a thumbs up, say, during radio play, they record features like day of the week, month of the year, season, the weather that day, time of day, maybe a geographic classifier like city&#x2F;suburb&#x2F;wilderness. These are all things that could be used to make localized, time dependent and situational recommendations. I like a lot of the &#x27;mood&#x27; playlists Spotify offers as well, but I&#x27;ve used players in the past where you have to choose between very similar and highly subjective things like calm vs tranquil to populate a mood based list, and I wonder if features I mentioned could make this a more passive process on the user&#x27;s part.