I roam around. I see a cave, and I go in. I roam around some more. Repeat.
I tend to avoid talking to people until I need supplies or want the game to progress a little so the world might change a little. Quests per se don't motivate me very much (in any game), but I do get around to them eventually. Often by the time I do, I've already found/done half the stuff they wanted me to fetch/do and I get to complete them right then.
I don't roleplay...I'm all about the sandbox exploration and sometimes, I just sit and watch the town, the animals, the "things" in the world as they move through their motions.