How does your gaming group make decisions about what to do in a sandbox setting?
How does your group set goals and decide on a course of action?
My Felltower group generally makes its decisions in an ad hoc way, with people interested in voicing an opinion doing so and eventually coming to a consensus. A significant number of the group don't have any particular opinion and will go anyway. In other words, people offer up ideas and if enough other people are enthusiastic or ambivalent about it, it happens. If people are mostly ambivalent or negative about it, it doesn't.
In Gamma Terra a small group of us - and I am one of them - have some definite ideas about what to do. So the group has been going about the decisions made by this small and decisive subset. It's similar but it's more like "this is what we'll do barring persuasive objections" and less like the above "how about we do this, unless someone else has another idea?"
We've toyed - in both games - with the idea of assigning a leader who gets to just decide what the next session's delve/adventure will be. But it generally has not stuck.
The whole Caller/Leader thing was something that D&D seemed to embrace back when I first started to play it. We didn't do that, but we read Examples of Play that had Callers or Leaders. In the beer-and-pretzels games we play now, having one person make a quick and irrevocable decision sometimes seems very attractice. We can just get on with it, instead of debating what to do.