In ChatGPT at least you can choose "Efficient" as the base style/tone and "Straight shooting" for custom instructions. And this seems to eliminate a lot of the fluff. I no longer get those cloyingly sweet outputs that play to my ego in cringey vernacular. Although it still won't go as far as criticizing my thoughts or ideas unless I explicitly ask it to (humans will happily do this without prompting. lol)
I am going to try the straight shooting custom instruction. I have already extensively told chatgpt to stop being so 'fluffy' over the past few years that I think it has stopped doing it, but I catch it sometimes still. I hope this helps it cease and desist with that inane conversation bs.
GPT edit of my above message for my own giggles: Command:make this a good comment for hackernews (ycombinator) <above message> Resulting comment for hn: I'm excited to try out the straight-shooting custom instruction. Over the past few years, I've been telling ChatGPT to stop being so "fluffy," and while it's improved, it sometimes still slips. Hoping this new approach finally eliminates the inane conversational filler.