Thanks for your criticism GeordeKirk
, and I'm glad you are enjoying it.
I agree, Polly is very much a May Sue. There's little point in denying it! Heck, I even had her say a line of dialogue from 'A Trecker's Tale', the spoof on bad fan-fic that gave us the term Mary Sue! I suppose if I were a more disciplined writer I'd have approached the character differently. On the other hand a few of my readers have been rather supportive of her, so I must be doing something right.
I do try not to make her too much of the focus of stories. Although she has always played a major role in the plot, she's not been the one to solve everything and save the day. I do understand that you find her OTT though.
Thanks again for your comments.