Why is a member's Profile important?
Most members like to know if they are addressing a male or a female; not vital; but it's good to know.
I, and I am sure other members, like to know if we are addressing a child "newbe", or an adult!
Very important for two reasons. Language and Time Zones. Just town and country. Not postal address!
Not important at all!
SOMETHING ABOUT YOURSELF.
If you write, even a little, about who and what you are; your interests. Then other members with similar interests will no doubt contact you.
Not important. A matter of preference.
So, you see? Leaving a Profile completely blank is not very good.