I must confess, I have yet to find the magic combination that makes PB+oatmeal palatable for more than half a bowl. My personal favorite way to flavor it is a pinch of salt, a generous amount of cinnamon, and a hefty glug of maple syrup. I usually add walnuts to it, but I'm out. I wonder if it would be tasty with some chunks of apple thrown in toward the end of cooking...