I love apples, and I like oranges and bananas. I'm partial to the Gala apples from Chile. They're crisp and just a little bit tart. I don't care much for the Red Delicious apples unless they're really fresh; when they get too old, they start to get mushy and have a really disgusting texture.
My dad only eats bananas when they're really green; don't know why, I think they taste too bitter. The best banana is one that's ripened just enough that it hasn't picked up any black spots.
And oranges have to be fresh, sweet, and juicy. Navel oranges are pretty much the way to go, but Mandarins are really good, too.