See, it's weird, but I never considered the Force all that supernatural. I mean, it's a natural part of the universe isn't it? It's created by life, holds the universe together, and is described as an energy field. It's certainly got a mystical/religious component, but I always felt that it wasn't meant to be seen as a realm above the natural world, but rather integrated into it. And I thought it was cool how Lucas merged the more mystical elements with more scientific aspects and demonstrated that they don't have to be contrary but can be reinforcing. But you're mileage may vary, I suppose. I've always felt that science and natural world are much more interesting than the supernatural.