Good one Jo. I do see more family stuff in Fantasy for sure. The current Star Wars book has some family dynamics in it. And Scalzi added a family dynamic to John Perry's story, which was well done. Other than that, I sometimes read that scene in a SF book where a pilot is going off to battle and thinking about their family back home; a picture of their little one taped in the cockpit.
I wonder if it is part of the draw of the escapism of reading. People want to live an adventure of a single hero, roaming the universe looking for something. I would like to read something with a more family centred plot. Do you see that more in YA or MG maybe? I haven't read a lot to know.