My answer is also very simple. I love it, I love it. I have spent much of my life writing fairly complex business reports, very dry, and I find writing - at least my writing on this site, a wonderful release. There are no boundaries, your mind can wander. It's also a challenge, most of my stories are long - too long, I'm sure for some - and I suppose the reason for that is, I don't know where or when to stop.
While I like putting my characters into quite unpleasant situations, yes, it's only a fantasy, I do try to develop them into real, relatively believable characters (in relatively unbelievable situations), rather than cut-outs, and sometimes this takes time.
For a long time I wrote simply for my own pleasure, and it was only when I viewed Gromet's great site, years and years ago, that I thought I might submit something (nervously). Reactions were, for the most part, positive - and here I have to say it is great hearing from readers offering thanks or encouragement - so I will carry on, four fingered, as long as ideas come into my head.