Just out of curiosity, how far do you go into creating the worlds your books/stories take place in?
Do you flesh out every last detail, whether it will go in the story or not? Or do you only make up the parts that will go directly in the story?
I posted a response to a similar question in another writing forum; if I remember I'll have to try to find that.
In the meantime, I like to at least know the basics of my world before writing, but I don't really tend to do this through worldbuilding, I just think it up over time. I write very long series stories so most of this stuff gestates in my mind for months or years before ever seeing the light of day.
I tried answering worldbuilding questions on a profile once, while I was also writing the story, and found that I had to keep going back and modifying my answers on the profile as what I had written in the story kept changing what I thought I'd known. Eventually I just gave up on the worldbuilding profile. In my experience you learn the most about your world from just writing the story itself. If you fill out some worldbuilding questions first, and then try to write the story around them, it might come out forced and stale, or, like with me, you might find out that your original answers are always out of date as the world you create through your writing keeps changing.
I don't flesh out every last detail (it's impossible, to me, to know an ENTIRE world!), but neither do I just focus on what makes its way into the story; I know lots of stuff that isn't in the work itself. I just think about it, and write it the way it comes out. Writing the story is the best way, IMO, to worldbuild.