I agree with you, everyone needs an hobby otherwise they just do the same old, same old, like going to socialise in a pub all night, every night.
I have too many interests, too many hobbies... That's when my mind becomes confused - too many things so little time.
So, bearing this in mind... and I have already started on this BTW.. I am using a combination of my talents and hobbies for the GREATER GOOD OF MANKIND, as I now understand that the little creative voices in my mind wish me to express the imagination/ knowledge within.
I feel everyone should use their hobbies to help others, a sort of volunteer martyr, but without the dieing for your cause bit !!