Many people use MM for its taste, it is hands down in my opinion the best tasting protein out there, so many great flavors. The results are also there if youre trying to bulk, I would only suggest MM for cutting if you're using the MM as a meal replacement with water, mainly because of the amount of calories per serving.
My favorite flavors: Orange Creme, Cookies and Cream (before it got old to me), Egg Nog, Chocolate.