I have used Designer Protien WPI for forever, and it works well.
Currently using ON's 100% whey, and i'm diggin that too.
Muscle Milk tastes awesome, but I stay away from 'wieght gainer' products because i like to control the amount of carbs that are in my postworkout drink.
I don't do this for my family, my friends, women, accolades, pride, or ego. I do it for me and no one else, its just part of who I am.