Well, I tried to incorporate most of the feedback I received on the first try.

--played with the eyes a fair bit, decreasing the ambience and reflection
--changed the eyelids somewhat (now that the render is finished, it probably could have been a bit more)
--longer lashes (still not long enough on the male) but still not thick enough
--added a few "imperfections" to the woman's skin
--changed the lighting hue (had a bit of a blue hue to it before; made it more neutral)

Again, any feedback will be welcome. (And, Amethyss, I will post this in the Poser forum too :)).

Thanks everyone!