I love peanut butter and all my life I have been a Jif smooth gal. In an effort to make some changes, I want to try some natural peanut butter. I've read from other threads about keeping it upside down so it's easier to stir, but I need other info...does it have to be refrigerated? How spreadable is it and do you have to microwave it in order to stir it or spread it? Does it have to be stirred each time you use it and how big of a pain is that? What brands are smoother, creamier than others?