Smoothies are the Devil's work, especially those with veg in. They taste like someone has already drunk them once and then regurgitated them back into the glass!
Quite. Orange and carrot juice is nice mind, although the quantities have to be just right. Guys I used to work with used to make those and stick a load of guarana powder in. Enough of it can give you a hell of a buzz, until you quickly gain a tolerance that is.