A friend who has been tinkering with LLMs reports if you tell them to act happy they're more likely to try things you tell them to.

When you make the LLM more happy it's more willing to try new or possibly dangerous things.

"Cool let's see if that works!"

Whereas if it's sad it's more like Marvin the Martian

"nothing matters why bother doing anything other than just the most boring, safe thing? Why try at all?"