I shall not get much into the definitions of "gen" here, since it was never much what I wrote, and considering all my writing of late has been for the Star Trek RPG, my entering the discussion wouldn't be all that useful anyway. However, there is a small piece of your post I must respond to:

"More later, since all the children have returned at once and my son is regaling me with the entire plot of Home Alone II."

There was a plot there?