From there, I read the essays and write down questions based on things they wrote down. I find them to be much more introspective when the questions are personalized. But I do always finish with "from all the candidates, who do you think would be the best drum majors and why?" I have been surprised the last three years at how many kids dont pick themselves and I find that it is easier to tell them later on that they did not get it when, they have already said they think someone is better.
I judged DM auditions at another school and I got sick of hearing "why do you want to be DM? - well I want to help people"
Know your kids and itll make the process much better for everyone involved. Finally, I use the audition/interview to try and build leaders for sections or the future. Its a great opportunity to have a very honest conversation with students.