I thought I like vanilla better, but the Greenerworld keeps it very Wastelandish feeling. There really is no immersion hit, because a lot of the landscape is still desolate. It just sticks foliage in at opportune moments (sorry, Pirates of the Carribean is on
), like around the Jefferson Memorial. It actually adds to the feel, because it makes it seem like the city is overgrown and devoid of life. Try it for a little bit, and uninstall if you don't like it. That's what I did, before I reverted back.