It is little things like that which I love about Oblivion. In Morrowind the NPCs are usually glued to the spot, and stay awake 24 hours a day. Granted, it makes selling your loot easy, because you can do it at any time. But it kind of ruins the immersion. In Oblivion the NPCs actually do things, like go eat lunch, work in the garden, pray in the chapel, sleep during the night, etc... It makes them seem more like real people, rather than toons in a game.