I tend to sprinkle that kind of stuff in descriptions, along with having characters chat in the images.

I tend to keep the major world building info in the character interaction charts I built. But it's always fun to think about.

I would enjoy getting to read more about your characters and the world they inhabit, especially world-building stuff or anything to do with day to day life that might not normally make it into the art you commission. I don't mean private stuff necessarily, just day-in-the-life kinds of things. Jobs. Hobbies. Family interactions/relations. That kind of thing.

Or really anything you might feel like sharing.

If you had stuff to share, I say go for it. ^_^ Getting ideas from others helps build our pages in the best possible way, so I think it's fine.