Aim to delight your users when you exceed expectations. But provide humble transparency when you occasionally but inevitably fail.
It’s also worth bearing in mind that usability doesn’t necessarily mean friendly; the usability of your UX writing is defined solely by how well it helped your users accomplish a specific task, not how it made them feel while they did it.
…ss marketing managers, but will result in blank faces with developers. Never assume knowledge. Best prepare by talking to individual stakeholders before presenting to them, to get a picture of what resonates with them.