For the best flavor, be sure to use bananas that are very ripe.
Just for fun, stir 1/3 cup toffee chips, candy-coated chocolate candies, peanuts, banana chips or raisins into the batter.
Stuck with more ripe bananas than you can use at once? Mash what you have, and freeze in 1 cup portions. You can add them to recipes as you need them.