Yes, ChatGPT seems to strongly prefer happy endings. Ask it to write a scene where a Montague bumps into a Capulet, and accusations start flying. One of the characters will successfully de-escalate. Or the price of Verona will show up with guards and stop the brawl. He'll even throw in some foreshadowing about how this will all end in tragedy.

I suspect that this relentless love of upbeat endings is a side effect of the RLHF training used to create the "assistant" persona. They wanted a friendly and harmless chatbot. And apparently it "likes" exactly the kind of stories you'd expect.