Switch to unsweetened, unsalted peanut butter. It's amazing - after 2 weeks I stopped noticing the difference. The amount of sugar in most peanut butter is absurd.

Once you kick the sugar taste, oh wow do you realize its got a much more interesting and involved flavor.

It probably does. Colloquially when one says peanut butter, people think of Jiff, which can be best described as a disgusting peanut-flavored spread product. Go with natural peanut butter (i.e. where the only ingredient is peanuts and it must be stirred) and you're all good.

Peanut butter without sugar is labeled as "natural peanut butter" in the US.