I do believe that a good amount of protein works really well to curb cravings and help with weight loss, but I cannot use protein drinks as meal substitutes. I know myself and I need the tactile experience of eating food for a meal in order to be satisfied.
I get my morning protein via eggs or yogurt or oats w/ cheese ... something like that.
That's not to say I don't use protein powder - I do a protein powder drink right after I workout every day. But that's as a snack, not as a meal.
However ... if it works for you, I'd say stick with it.
We're all so different and we all have to find what makes it easier for us.