One question that my friend asks is what negative trait does he have.Everyone is not perfect and not every negative trait is bad so it would be interesting to hear what is said. When we were looking into a boy when my daughter was going out all we heard was great things about him so when I asked what negative trait he has we were told he is very absentminded which might be fine for some but not everyone could handle it.
Also dont forget to ask if he is on any medication or if he has any chronic illnesses you would be surprised as to what is not told if not asked.