Greek yogurt is thicker and creamier than the other kinds and is also very high in protein. It also has lower sugar and less lactose, I believe. I think it is strained to remove the liquid. I buy the fat free version in fruit or vanilla; the vanilla has 110 cals per 5 oz container and the fruit varieties have about 130. To me, it's well worth it for the 15 or so grams of protein. (I think the stuff Desertmountain provided the nutritional info for is the plain and you can doctor it up with sweeteners or whatever else you want to put in).
And now that you don't have to be perfect, you can be good.