Flavor. Not to sure what type of brand your using, but for the most part if your taste buds don't like the flavor, you'll gag. I tend to enjoy Muscle Milk branded protein shakes (chocolate, mint and chip, banana). read more
However, I do take whey protein and make my own from scratch. I personally like EAS Vanilla Whey Protein, but there's lots of good brands. When I make a shake, I use a cup of skin milk, a serving of protein, half a banana, and half a cup of frozen strawberries with six ice cubes. read more
protein powder makes me wanna gag too, but I found that the GNC fruit punch weigh protein is alot better if you mix it with great value fruit punch drink mix for the single bottle water. i much prefer this over my chocolate protein now, it tastes close to kool-aid. read more