We've bought so much of the 12-packs at Costco that I'm just a wee bit sick of the strawberry, blueberry, and even peach. Fortunately our local Harris-Teeter has pomegranate, black cherry, lemon, pineapple, mango, vanilla, and even plain, which I am going to buy a lot of as soon as the local fruit starts appearing at the farmers' markets.
Hard to pick one favorite, but the mango is really good.
Interestingly, most are non-fat, but at least two -- mango and pineapple -- have small amounts of fat. Does anyone know why? Do those fruits have some fat (like avocados)? Curious.