At a minimum I roast Buckwheat and millet and soak them in the water before I bring it up to a boil. Buckwheat gives off a more nutty taste and I usually do anywhere between 1 and 4 lbs of roasted buckwheat and millet. I also use a bit more hops in just about every brew that I do.
If you have more time, I suggest you malt your own grains. I malted a few lbs of buckwheat and used that in conjunction with the soghum syrup and the beer turned out really well. Depending on how much you roast the grains, you can add color to your beer. For stouts I almost burn 4 lbs of buckwheat and seep in the water before the boil for an hour (I also add coffee as well so that helps with the stout color).