What is the longest amount of time you have gone without eating? What were you doing such that you did not eat? When you are again, what did you eat? How did you feel?
What is the longest amount of time you have gone without sleeping? What were you doing? Or did you try and fail to sleep? Why couldn't you sleep?
What is the largest amount of food you have eaten in one sitting?
What kind of food did you used to like and no longer like?
What kind of food did you used to hate and now like?
What kind of bad eating habits do you have?