Cassi (bizlawchik) is probably the best one to ask about the different plans. I'm on blue (due to exercise and long hours of studying), and I absolutely love it, but I'm pretty clueless when it comes to knowing which plans are best for different people. What I do know is that blue has 1/2 an extra protein compared to purple, but the protein sizes are smaller, so it probably works out to about the same. Purple has one more veggie than blue, and blue has one more starch (which is the main reason I love it so much, I'm addicted to my carbs!!!). If you really feel that your plan isn't doing it for you (ie. you're hungry all the time, not just cravings but real, OH MY GOD, I'M STARVING hunger), then I suggest you keep bringing it up at your COD. They're usually pretty willing to mess with plans to find what's right for you