I like mine around 7 or 8. Yum. I really don't think there are 10 levels though haha, its either dry, soaked, or fallen into the milk. I like mine right before they fall into the milk.
Also, I have no idea how the oreo factory hasn't thought of marketing a cereal with all their broken pieces. They must have a mountain of broken cookies from the overall process, why not do like the cranberry industry did with craisins and make oreo cereal with your waste? C'mon nabisco, take your head out of your ass.