Dragon fruit tastes wonderful! - sweet and crunchy, with a flavor that's like a cross between kiwi and pear.
Step #1 - To choose a ripe dragon fruit: look for bright, even-colored skin. If the fruit has a lot of blotches, it may be over-ripe (a few is normal). Another sign of over-ripe dragon fruit is a very dry, brittle brown stem, or brown on the tips of the "leaves". Hold the dragon fruit in your palm and try pressing the skin with your thumb or fingers - it should give a little (like a ripe kiwi), but shouldn't be too soft or mushy. If it's very firm, it will need to ripen for a few days.