Ideas

Questionnaire at the beginning: Genres, Artists, Albums, mood,
Promps your mood and how adventurous your feeling daily?
Explore feature (try new things maybe they're popular to expand palette)
Feeling personalized but not targeted
Oauth spotify and site login (Firebase)
All Playlists page
Export playlist to other platforms
Social aspect (see what your friends are listening to, maybe a tweet button, or just a share button through text/email)
API for texting the playlist
Present 5 options and ML knows which one you choose
Swipe left function
Add to playlist list
ML is light on User but more specific on Playlist, so user doesn't get pigeonholed.
Start explore based on an existing playlist

Provide feedback