Today a writing friend told me he'd been writing for as long as he'd been in his previous occupation and that he loved both jobs because they made him feel like himself. That's one of the best two descriptions I've ever heard about the appeal of writing. The other is "putting the world to rights".
So there you are. If you're a writer, and someone asks you why you write... tell them. Rather, think about it now before someone asks.
I do it because it makes me feel like myself.
I do it to put the world to rights.
I do it because...?