Peanut butter (any kind) and darn near anything else, on darn near any kind of bread-like container is just fine with me.
John's PB and cheese sammich is great - although I've never considered adding pickles to it.
PB schmeared on apple slices
PB schmeared on a banana
PB on ice cream
A heaping tablespoon of PB stirred into your pot of chili adds an intriguing something