VERY kind of you to comment so fully, thank you!

What you say about being unique...is well...rather unique because I hadn't seen it in those terms. It is an advantage I had not realised, until you mentioned it. But I will now. ANd I take your point that what I am interested in writing is not mainstream stuff so finding the right niche audience is important.

Thanks also for the link. From what you're suggesting, it seems I have instinctively followed that advice already, using logic to determine what keywords accurately reflects my content.

Really appreciate your input, thanks lots!