Monster Energy Drink = Bile in a can

Ever had this drink?  I just purchased one from the cafe downstairs at my office to try and help wake up, and I have to say that this is hands down the most disgusting drink I have ever had.  I have had Red Bull, Rockstar, and a few others, all of which are not great by any means.  But good grief, this drink seriously tastes horrible.

What are some decent tasting energy drinks you have had?