My own recipe was the worst. I tried adding 10% Organic Strawberry (CAP), 2% Vanilla Cupcake (CAP), and 2% Sweetener (TFA). Weeeell, the flavor wasn't there except for a slight hint. It wasn't even sweet! So I made another mix that went to 15% straw., 2% van., and 2% Sour.
Oh man. It tasted like chemicals. And it wasn't even sweet! The ironic thing is that I significantly increased the flavor by reducing it. Doing so even allowed 2% Sweetener to be sweet.