1. In the opening section of Boletaria Castle, I was passing the hole in the grating, the one that drops down into Miralda's lair, when it suddenly occurred to me just what all the swirling lights in the hole actually were - a concentration of souls that had risen from the numerous corpses dumped in the pit below.
2. In the Tower of Latria, where you pick up the knight's fluted armour off one corpse and the silver bracelets off the corpse next to it, I suddenly saw that the two corpses are holding hands in death. So it seems that the knight was in the process of rescuing a woman (since the silver bracelets are female-only) from the tower when they were both killed in the attempt. This is an amazing little detail that I never noticed before.
These are both great touches, and they once again reminded me of just how many little details From managed to fit into both Demon's Souls and Dark Souls - details that may be small but which can also enhance and add further depth to the experience and atmosphere. Amazing games.