I recently interviewed Cammy Bean and she said that the #1 challenge that most instructional designers have shared with her is that they're in a stuffy culture that doesn't allow them to use an informal or conversational tone.
Back when I used to do client work, I know I had that experience. Once, I actually had a client remove all of the contractions from the audio script that I wrote. When the voiceover talent read the script, it sounded like a robot!
Does your organization restrict the use of an informal/conversational tone? How do you handle it?