First an introduction: I followed lottelita and theironjef, both of whom I know in real life, onto this group.
Now my question: I've been slowly putting together a campaign world between bouts of dealing with real life. I'm trying to better organize my thoughts about it and start to put it into some sort of finished form. I'm not sure what I'm going to do with it, but to me that is much less important than the process of thinking it through and creating it. Anyway, I was wondering what you guys find most important in the description of campaign settings (fluffwise) that you run (whether they're published or ones you make up)? What parts are the most useful for you as the GM? I know what I always look for, but I'm curious how others approach a new setting.