You can try an unflavored one and throw in some PB if you don't like Choc or Vanilla. Haven't tried all these that are mentioned here but the ones I have are all good.
I've tried a few protein shakes and the only one that tastes good in water is Myoplex Lite Tropical Fruit flavors....the orange jubilee is the best one
I like Prolabs whey isolate. 100kcals per scoop. 1 scoop gives you 24g of whey & basically 0 carbs. Tastes great & mixes well in a shaker. I like the Tapioca Vanilla flavour.