Thanks DianaMiller and warthur for your replies. It is extremely interesting to read people's thoughts on the questions, and also your experiences with the writing process! Some comments below.
DianaMiller:
I'm a bit late to the party, but I hope I may still answer the questions, for what it's worth.
That's perfectly all right! In fact, if you had replied a few days ago, I might actually have exploded from information overload!
DianaMiller:
I've got a story published on this site which I knew beforehand wasn't going to be popular. I wrote it as part of a challenge, and that's what it was. Challenging and amazingly fun to write. It might not appeal to the masses, but the few comments I did get were very flattering and I cherish that.
Now I'm curious. What you mind telling us what story it was?
DianaMiller:
However long you want to let your story sit between writing and editing, it is wise to do the writing and editing at different times, because those activities require different areas of your brain. When I can't think of the right words to describe something or what I've written sounds off, I highlight it and come back to it later, to not disturb my writing flow.
Interesting, though I'm not sure I understand completely. When I reread something the editing tends to happen automatically, as I notice things that should be changed. I'll then mark the text so I can get back to it later. Maybe that is also what you do?
DianaMiller:
Your story idea definitely sounds interesting so far, Astrosmurf, go for it!
(and sorry for my long response)
Thank you very much and you certainly don't have anything to apologise for!!

warthur:
I am always extremely impressed (awed is probably a better word) by how seriously you regard the genre we all love.
I concur wholeheartedly!
warthur:
First, I would suggest reading Stephen King's book, On Writing. It's probably the best writing book I've ever read (and I've read more than a few).
Thanks, I should check that out!
warthur:
My first publisher told me not to worry about it, that if I liked it, others would too. I have fully embraced that concept. You have to accept that not everyone will appreciate what you write, so write what you like and don't worry about the potential audience (just make sure it's your best
That is encouraging!
warthur:
In fact, in answer to one of the questions asked, I have adapted two of my stories into mainstream by taking out the actual spanking.
Very interesting. I don't suppose you could be persuaded to elaborate on this? Do you write for a living?