Recently I've been mainly using supplements with only natural flavors and sweeteners(Hard to do btw) and I am glad to see NutraBio adding their own natural line to the mix.
I think the hardest part for companies is making a natural supplement taste good. For my preworkout, I've been using Transparent Labs Stim Free(which I'll be reviewing soon), which is okay taste wise, but nothing to write home about. My BCAA is Scivation's Xtend Free strawberry kiwi(DO NOT GET THE OTHER FLAVORS) and that taste great, however they did use a tiny bit of sugar to sweeten it.
The object of war is not to die for your country but to make the other ba$tard die for his. - George Patton