As with most things, it can get interesting if you don't rely on defaults. My personal amusement in that area includes chatting up fictional characters with unique 'voices'. And even simple capture of consciousness can get more interesting if you apply stylometric analysis to it.

Makes a lot of sense! Interesting choice of use, I’ll have to try it out. I write some sci fi.

Personally I use LLMs to study languages, particularly German. I find it enormously helpful.