I don't know why, but after about 2 weeks of taking the same whey shakes, I'll get completely sick of it and start getting nauseas every time I drink it. This has happened with ON Chocolate Whey and WP40 Vanilla. I don't know if it's the slight chemical taste that protein shakes have, or the nasty texture...but every time I get a new flavor, I'm good for a little while. Does anyone else experience this, or am I a pussy? I'm thinking about ordering ON Cookies N' Cream or Rocky Road.....input?