When I first joined Chicago-North RWA at least 13 years ago , one of the things I learned was if I wanted to get published, I needed to study the market.
The fiction market at the time frowned on singers, sports heroes, older people, or people with infirmities as main characters in books.
Since then, it appears the market's attitude has loosened, but I wonder how much. I've noticed that Boomer authors are getting older and some of their characters are aging along with them. Other Boomer authors are still writing about people younger than themselves. So far, my published novels are about younger characters, although I am a Boomer. My work in progress does contain middle-aged characters, but they don't stay that way for the entire book. You'll see what I mean when it's published. (G)
Anyway, I have noticed more novels which include blind characters, cancer survivers, and people with other disabilities, but not many yet about singers or sports heroes.
What do you think? Have you noticed a change in the market? Do you write about characters who were once considered no-nos?