When I'm hit by a Pinkberry craving—which come infrequently, but there's no denying them when they do—I never really bother with the flavors. It's the original I want; sweet-tart and refreshing, maybe with a few raspberries or mango chunks on top. But after trying the new grapefruit flavor, I'm starting to reconsider.
The grapefruit's own tartness works well with the standard yogurt: It starts out tasting like grapefruit soda, about that balance of sweet and grapefruity, before the initial taste fades to the classic Pinkberry flavor. It would work well with any of their fruit toppings.
I've never understood the appeal of Pinkberry's fruity options, or Red Mango's, either; they don't taste like the fruits they're named after, but very distant approximations. Grapefruit is the first that convincingly pulls off its name, and it's better yogurt for it.
Have you tried the new Pinkberry flavor? What did you think?