Olive oil. Makes the oats stand by you much longer. Currents are good too. They add fiber and sweetness. I also add Flax Seed and Wheat Germ. Flax Seed in particular adds fiber too and Omega.
I also switch Currents for Blue Berries at times. Need a lot more volume for the same fiber though.
There are different kinds of oats. Quick, Thick Cut, Regular, Steel Cut. I am actually using the thick cut kind of quick oats.