As usual, you can take advantage of custom instructions to guide ChatGPT's personality in a direction you like, especially when the presets don't give you those options. For example, if you'd like ...
ChatGPT’s tone has been an ongoing issue this year, with OpenAI rolling back one update for being “too sycophant-y,” then later adjusting GPT-5 to be “warmer and friendlier” after some users ...
OpenAI is rolling out new personality settings that let you fine-tune ChatGPT's responses for warmth, enthusiasm, and more.