I'd love to see Beregost again! I am a fan of re-visiting old maps as long as there is a story-line to follow. There are lots of ways to do this: chasing a fugitive, finding a hidden cache, consulting with a town magistrate on the latest threats, etc.

I like having the illusion that the world keeps moving along, whether my PC is there or not. So if we do go back to an area, I hope to see once in a while that a couple things are different and that the people have something new to say. That gives the graphics department a break, but it means more work for the writers, and what writer does not want to have more story to tell?