I suggest you all go out and buy a few pears and see what you've been missing.
A word on timing: Pears that are still pretty hard to the touch can be purchased, but keep them in a bag for a day or too. When a pear feels slightly soft, they are perfect for consumption. Too soft, and they are just that - too soft and mushy.
If anyone would like to offer their own most underrated fruit list, or dispute my claim, please add your comments below, and I'll tell you why you're wrong.