“Tastemates”: somewhere out there is someone who likes all the same [books/movies/music etc] as you. 

Have an algorithm find that person and surface the things they love that you haven’t discovered yet.

Makes the recommendations more trustworthy.

Crypto/web3. Author of Read Write Own

readwriteown.com

This was the original genius of last.fm’s musical neighbors. One of the first social use cases I fell in love with.

This was also the core use case behind Path: “bookmark your life.” With the hopes of connecting like minded users over time. @cdixon.eth I remember you working on Hunch in the same period which was same genre. We are still missing the vision becoming a reality a decade or more hence.

Complexity explorer. Residing in the liminal.

It is one of the “lifestreams” I have tried to maintain for the last 20 years. Only missed one year where I forgot to have audioscrobbler plugged in. You can plug it in via API on Spotify which is pretty great.

I've just started reusing last.fm for this very reason after leaving it dormant for years. I've set it up to scrobble my Sonos.