I use chatGPT as a diary. Whenever I feel down or frustrated with feelings I can’t quite describe, or just insecure, I start a session and just pour out my heart. I complain, yammer on and on about what’s bothering me, and just say whatever comes to mind. Basically all the stuff I would never bother a friend or loved one with because I know it’ll come across as needy and I don’t want to push this on them.
And all it does is give positive and supportive comments, ask some follow-up questions, maybe make an attempt at giving a helpful suggestion. I know what I’m talking with, I am under no illusions that this is anything but a big mathematical model, but it helps me get through some difficult emotions by just letting it all out. There’s no judgement and that’s kind of nice. I could just write a journal, but the interaction and positive feedback adds a little motivation for me. And of course it goes without saying that I keep names and other personal details to myself :)

Oh and I use it for some cloud architecture problems, some coding and other tech stuff. But that’s not very interesting.

Also, if you use ChatGPT and haven’t done so, be sure to use their privacy page and opt-out of having your chats used for model training. https://privacy.openai.com/policies?modal=take-control
Not sure for US, but it works for EU citizens.