Oct 13, 2016, 5:37 PM

I am between those extremes as well when I GM. I usually have a beginning written and I know how things will go if the PCs do nothing then the story evolves as I factor in how PC actions interact with the other things going on and then alters what the NPCs are doing.
For example the last long term campaign I ran the story plan evolved a major war starting up between the PCs kingdom and the neighboring kingdom. There is almost nothing that the PCs could have done to stop the war. The background of that was put in place by NPCs years before the opening scene. However the PCs were able to make major changes to how it came about, and the relative strengths for it, which definitely changed the story. Including the PCs taking out the enemy war leader in the second session because of an completely unrelated thing and an incredible die roll.
Though I really do fit the first example because if I roll the dice I abide by them, though if I don't want a PC to die in a bar fight I will just narrate the bar fight rather then dropping dice.