Paul Eggleton

I've heard of a pro bodybuilder who lived off protein drinks permanently. He wasn't that good though and I think he ended up doing gay porn

I would advise trying to build up your diet with good quality foods, find out where the gaps are and fill these with a protein drink. You can different forms of protein powder too, some with more carbs in than others(these tend to fall into the meal replacement category - METRx are good)