Kind of a close cousin to the "which character do you feel has most improved" thread.

Which environmental expansion did you enjoy the most?

I really liked the train graveyard. I already like exploring abandoned and decrepit places in games, such as the Shinra building in Dirge of Cerberus, so I was really excited to get a fresh take on a familiar place.

I really like the (SPOILER)glowing ghost messages, and the story behind it especially as a nice contrast to the gloomy area surrounding them.

Still being able to steal a staff for Aerith from that carriage horse thing is a nice callback, as well.