I don't think a bread machine is a good tool for making banana bread, primarily because banana bread isn't technically bread. It's cake. There's generally no yeast in it. It's made of batter, not dough.
I've been using this recipe for banana bread for years and people always rave about it. It takes like 10 minutes to prepare and 45 minutes to bake, and you really can't screw it up.
Bowl #1:
4-5 tablespoons softened (or melted but not hot) butter
2 eggs
2-3 superripe bananas (the blacker the better, as long as they're not moldy)
2/3 cup sugar
Bowl #2:
1 1/3 cups flour (regular "all-purpose" flour in US, finest-grain flour in countries where there are many types)
3/4 teaspoon salt
1/2 teaspoon baking soda
1/4 teaspoon baking powder
1/2 teaspoon cinnamon (this is recommended but optional, and I often use more than this for added flavor)
Mix the bowls together, add a handful of chocolate/nuts/dried fruit if you're into that kind of thing, pour the batter into a greased bread pan (or 2 small ones), and put it in the oven at 350 F / 175 C. Small loaves take about 30 minutes, a big one takes 45-55 minutes. Check with a toothpick or knife - push it into the center (all the way down), and if it comes out clean, it's done. If it comes out with batter on it, stick it back in for a few more minutes.
This is my standard gift for everyone for all holidays. I just buy a heap of bananas a week or so before I'm ready to make the bread and make a few mini-loaves. Everyone is always super impressed and happy about their gifts and no one complains about always getting the same thing from me.