I'm *mostly* with you there. I enjoy the occasional soda (maybe 1-2 a month, if that), but mainly I drink juice (preferably grapefruit) or water. In the event that I do drink a soda, it's usually Sprite/Sierra Mist or Coke/Pepsi. I really don't draw a big distinction between the brands. Sure, Pepsi is a little bit sweeter than Coke, but I like them both about the same.
All that said, ginger beer is a real treat when I get the chance to have it.