I, for example, am very turned on by contrasts. So noticeable height differences, size differences (individual body parts or the whole package), skin tone, shapes, etc.
I kinda wish my wife (who’s very pale) were bi because I would love to see her have sex with a dark skinned woman that’s a similar height and weight as her, or a short, petite woman (she’s also tall for a woman).
I mean, your wife could do someone male to provide that contrast, even more contrast, right? It wouldn’t require her to be bi. I do also find contrast beautiful, like black hair and pale skin is so pretty and yes two different looking bodies entwined. I don’t like when guys are huge and women tiny, or vice versa, though. Have always dated guys around my height.
I agree with both quiet non arrogant confidence, and competence, those are hot.