I haven’t used ChatGPT for character development, and I won’t considering @Avarice’s comment on its usage of rather cliché tropes. However I specifically used it to brainstorm government structures for the four countries in my world, which, I’ll admit, does rely on some real-life geopolitical archetypes.

I already had three countries in place: a constitutional monarchy, a federated state, a semi-theocratic monarchy (with a touch of democracy), and a fourth one. ChatGPT suggested a “socialist confederation” which was quite unexpected for me. It also helped with brainstorming the structure of country #4’s government, and even an outline of its constitution since there aren’t many real-world examples I can reference.

LLMs can be useful for creative writing, just be aware of its limitations.