To me, half the appeal of any game (but mmos in particular) is the opportunity to explore the fictional worlds they're set in. I've always loved the feeling of entering a new zone and taking in all the sights and atmosphere. from what I've seen so far, Rift's zones look like they'll be excellent....very picturesque and well-designed. In particular, I'm looking forward to creeping around Gloamwood, as I've always enjoyed gloomy/horror themed zones.
So, beta testers, what are your impressions of Rift's environments thus far, and what do you look farward to seeing in the future?