The problem with that is I know that at least personally, I would feel obligated to do one of those things, so it would be more like choosing a story from a list than crafting something more enjoyable. Sure there wouldn't actually be any pressure to do any of the provided suggestions, but choosing not to pursue any of them would feel like disappointing people and going against what was secretly wanted. If nothing else, it likely establishes a theme which would discourage some of the more inventive potential plot lines.

What I was suggesting as a compromise was to at first not give any of those kinds of guidelines, but make it clear to the player that they could ask for such suggestions or at least get help with brainstorming things if they were having trouble.