Further to this, I have a TV version that's also working brilliantly. There's a spreadsheet recording show coming soon/watching/finished/abandoned and our thoughts on it. This is the shared household ledger of TV. ChatGPT can read and write to it and learns our preferences.
I have a vague prototype of ChatGPT music companion. It has my full Spotify history. It suggests what to listen to based on that, feedback and chatting about music. It has largely created a pretty accurate picture of what works for me.