I've played both Dark Souls and Demons Souls, and while I really, really want to like them, I can't get into it. I enjoy the gameplay and I like the challenge, but the story-telling leaves a lot to be desired. It's simply too guideless. It's the same problem I have with sandbox games. If you put me somewhere and say "have fun", I fiddle with it for ten minutes and walk off because I can't invest myself in it. I need to have a goal, something to work towards, and both of the Souls games simply handle conveying that to the user very well.