The Ghost
Explorer
So an adventure is putting a mouse in a maze and following him as he seeks a piece of cheese.
A situation is dumping a mouse in a field and watching what he does next.
Right?
That's a pretty simplified way of looking at it. But, I would agree. It also illustrates the main strengths and weaknesses of these ideas. Dumping the mouse in a maze limits his ability to choose his own direction. He can go forward, backward, left or right. However, he has motivation - the cheese. Dropping the mouse in a field allows him to go in any direction he chooses, however, he may not have any motivation to move. In my case, the people I play with already have motivation, so dropping them in the field works best for us. Others may find that they need to motivate their players by placing the cheese. Some may also find that their players experience paralysis of choice. They have too many options and therefore cannot determine which is the best option to take. Any way you do it needs to work best for your individual group and how you enjoy playing.
Couple more questions.
Are modules then Taboo? By the definition, modules have plots and an assumption of what the PCs will do, which is anathema to sandbox DMing. Even paper-thin "go in this dungeon, kill everything and get rich" plots are still plots and thus limit PC choice. So no modules?
For some, yes. I use mine modules for ideas to place on the map. If the PCs go in, this is what they find. If not, no big deal.
How do you handle "larger" repercussions? Cadfan's example of the necromancer's horde. If player choice is king and they don't feel like dealing with it (they'd rather explore the Goblin Warrens to deal with the bandits), is it fair to have the zombie horde sack their village, or aren't you in essence punishing them for not following the lead?
There is a lot of "it depends" in my answer to this. In some cases I would say it is fair to allow the attack to come. Say, if the PCs learned said necromancer is building a large horde to conquer the valley. If they choose to ignore that then, yes, I do think it would be fair to sack the city. On the other hand, if the only thing the PCs hear is that a necromancer exists, then no, it would not be fair. In the first instance, the PCs learned something that is true. The necromancer is going to attack. In the second, the PCs heard a rumor. I don't have to do anything with the rumor, I can leave it as that.