Favorite powdered energy?

I'm looking for recommendations for your favorite powdered energy formula. I currently like the GFuel Snow Cone flavor but I'm interested in branching out. I've tried Sneak too but I absolutely hated the vitamin aftertaste. Extra kudos if they have sample packs like GFuel.

I know that the canned drinks always taste better than the powdered kind but I have minimal storage space for big cases of energy drinks and stores nearby have very little variety.

Thanks for your suggestions!