Some of us prefer to write in the 'real-world' places we know, time periods familiar to us, or in fan-fiction settings where the rules (or most of them) have been laid out for us by someone else. But there is something satisfying and 'god-like' in creating a fictitious world for our characters to play in. Where would we be without the world-building efforts of Tolkein or Roddenberry and Martin? Doing so believably, making the world 'real' for the readers, is both a source of frustration and joy.
I thrive on world-building. I love it. Invariably, no matter how much thought goes into the process, niggling details pop up during writing that I did not anticipate in the planning stages (like...really...what does my MC do for a bathroom in a Viking-like community...can't he just hold it until the end of the story? lol)
Here are just a few things to consider when building a sandbox for your playthings:
Do you have any favorite world-building resources? What do you like most or hate the most about the process? What details do you tend to forget?