» Sat May 28, 2011 3:09 am
I think it's pretty clear that Nuka Cola is meant to be a trademark-safe version of Coca Cola, an archetypical American drink, especially in the 40s and 50s. Even the logos are similar (though the blue bottles in the earlier games are a bit odd, a bit more Pepsi-ish). According to wikipedia, what most of us think of as "cola flavor" is mostly vanilla and cinnamon, with hints of others (citrus fruits like orange, lime and lemon are common; I'd add a little pomegranate, what with the mention of a shortage.)
For Quantum, all bets are off. I'm inclined to what others have said about Red Bull, though; I recently tried some for the first time ever and my main impression was "aggressively chemical and citrusy - like a safety-orange graqefruit grown in a lab, in a box that leaves it shaped like a cube. Sticks with you for a while, too."