Summarize the following:
It's best if frozen. As long as it's ripe, it'll be fine. When it's frozen, it's colder and it eliminates the need for more ice. This is where your creativity can take over. Vanilla is standard and will let the banana shine, but the world is your Baskin Robbins right now. If you wanted 31 different flavors in your milkshake, it could happen. What are you hankering for? Some recommendations? Peanut butter, chocolate, peanut butter chocolate, strawberry, coconut, mango, or coffee. And if you can handle it, banana. At last, this is an excuse for a taste test! Try a spoonful and gauge how much sugar it needs, if any. Honey is a good natural alternative, and a sugar substitute (such as Splenda) is good, too. A teaspoon or two ought to be enough.

Summary:
Put a sliced banana or two into the blender. Add a scoop of ice cream. Add sugar to taste.