I have a RULES file for my coding agent which I invoke when I get bored. It basically simulates a real office environment saying things like "while the queue is full our worker is sitting in the corner with its thumb up its ass looking at the wrong queue".

Which is hilarious, but when I'm driving on the freeway and trying to add milk to my grocery list or add a navigation stop at the hardware store (no idea if these are things you can actually do, I'm just using what feel like plausible use cases for a car voice assistant) I wouldn't want the additipnal distraction of the voice assistant being funny.