I did a fine tuning and embedding on a large LLM that is based on 50 years of daily journal entries, extensive daily notebooks usually measuring in the hundreds to thousands of words per day, and personal writings across a half-dozen different blogs and websites and various social media feeds. Social media posts and comments (including this one) are also put into my notebooks with a snippet of context about why I posted that.
In my journal and daily notebooks I write out some pretty deep and dark thoughts too. It's about as close to a snapshot of my inner thoughts as you can imagine.
And the LLM digested all of that. It took quite a while.
It has provided some interesting insight into who I am as a person, and also how I see myself.