I'd like for there to be a survey question option as an available question type on the graded quiz.
Sometimes I have an opinion question in among the graded questions. Currently, I just mark it's value as 0, but I'm still forced to select a correct answer from all the choices. Then if the students have access to see the assignment results they may see their opinion as marked wrong.
It could be setup as a multiple choice style question that simply does not require the teacher to select a correct answer.