I came across this interesting article a while ago, which is more accurately titled, Why Women Write? It makes interesting reading and I'm sure we'll all find a similar reason to our own in the responses.
The immediate question that struck me, however, was why should there be any difference between why women write and why men do? Or perhaps the article was only aimed that way because it's a site about women and books. I won't get into the whole male-female writing debate as it's been done to death. Mslexia magazine, which is aimed completely at women writers, is still alive and well and often carries comparisons between the genders.
My own reason for writing is multi-faceted: to express my thoughts creatively; to write out the stories and characters inside my head; to entertain and inform; to earn money where possible instead of going out to work!
No doubt you all have reasons of your own for this enjoyable, exciting, frustrating and creative activity.
I've been interviewed again and only discovered it last night, on Authors Interviews. Relentless online promotion when anew book comes out and people can't find it by wandering into a shop!