Max, do you have a good suggestion for a neutral umbrella term that will include 'roleplaying games', 'storytelling games' and games that are both, but not include board games? That would be useful to me at least.

So far, lots of people seem to be content using 'collaborative storytelling' for this. You seem to be offended by this, and as I agree that it feels a little misleading I would be happy to find something better.