I've played pretty much every single-player RPG there is, has been, ever will be. But as far as the MMOs go, especially with the voice chat, it becomes like hanging out with your friends in a chat channel, and you're playing at the same time. So it becomes a lot more social than people would probably think.
I think that as a playwright, if I detail that environment, then I'm taking away something from them [designers]. I'm taking away their creativity and their ability to have input themselves, not just to follow what the playwright has written. So I do a minimum set description and let the designers create within that.