What exactly it the mistful effect? I know there is a popular H/D writer with that name, but I wasn't referring to her in particular.

Exactly. I really try to give something back when I review, even though sometimes (when in a hurry), I write a single-liner, too. I don't expect a full-blown conversation to come from every review - especially when a writer gets lots of comments. That would be unrealistic. Just a little acknowledgment that my effort has been seen, if not appreciated.