That's going to depend on the question -- If the question lends itself to a direct answer and you got all verbose, after reading X-hundred applications, I'd get annoyed and welcome a short & simple answer or bullet list. But if the question is more open-ended and your answer is super-short, you leave opportunity on the table.
So if the question was: "How will you add diversity to the class?" the answer should be an essay. But if it were "What extra-curricular activities demonstrate the diversity you will bring to our class?" then a bullet list might be appropriate and welcome.