Valuable comments all, thank you. droberts, I will pay more attention to getting the appropriate sharpness/clarity, to suit the subject and the mood. To all, esp. plexica: the intended subject is the emotion between the two people. The background is just a roadside and a shed, worse than boring. I considered showing the product the two were selling, but thought that this would have distracted from the stated objective. Selling the photo to third parties was not my intention. My hope is that, when I deliver a print to the two, they will say that this is their best picture ever of themselves. In my small community, that may be sufficient to get others interested, through word of mouth.
Re the crotchety faces: This is what real persons look like in my market area - or even more worn by time and life. My guess is that Beautiful People all dolled up would only scare off my potential customers.
I have asked my friends to assess the colors etc., but find their replies based more on their personal tastes than on the technical merits of the image. POTN members have better judgment.
I continue to seek your advice, in the light of my perhaps unusual setting and modest ambitions.