One aspect of a world with supers would be parenting: how do "normal" (unpowered) people) deal with kids (adolescents, pre-teens or worse: toddlers!) that have even "minor" levels of superhuman strength, energy casting, invisibility, flying or whatever?
If supers have existed for decades, there would be best-selling books, specialized family counseling and pediatrics, schools and foster-care for super kids, to name just a few ways Western society would respond. Some interesting topics for character background.
And that's just normals raising supers. What about being the normal child of a super parent? Or the sibling of a super? What if a parent (normal or super) desperately wants a metahuman child and is disappointed? Family counseling would definitely seem prudent, even one of those no-doubt expensive specialists.
I know comics and movies have explored some of these possibilities, seriously and less so. I"ve used some for character background myself. Any examples anyone thinks are particularly good, your own or others?
You say nice things about me: I admire that in a person.