I still replay BD every now and then. Acts II and III really shined for me. There was not enough roaming in the 1st and final acts I thought. But the world of BD is one where you're always the outsider, and you're always locked into the main driving quest of escaping from a hellish and alien place. I remember wandering around the Act I battlefields (the only green forest area in the game) listening to some haunting acoustic guitar music on the soundtrack, thinking, ahhh now this is nice. That and the imp village really epitomize the game for me.