One thing that still puzzles me is Q's offhand reference in VGR's "Death Wish" to "a misunderstanding which ignited the hundred-year war between the Romulans and the Vulcans." What hundred-year war? Where in all of Trek history is there room for such a war? Nobody on screen or in print has ever picked up on this or explained it. Maybe by "Romulans," Q meant the forebears of the Romulans, the faction that departed in the Sundering. Maybe they fought for a hundred years before deciding to leave Vulcan. Not sure that meshes with the books, though.