I've been jamming on some #GPT roleplaying chat. My daughter is doing a report on Shakespeare so I wrote a quick prompt so she could chat with him. She's enjoying it. There is a certain sense of discovery when you aren't sure how the character is going to respond.
I have also lightly used Khanmigo and realized I could compare our chatbots. The underlying tech is the same (though I mostly use 3.5, which I find very suitable, and I think Khanmigo uses GPT-4).
Some comparisons follow...