Pepsi or Coke?
Before giving up pop (I'm from Michigan, so it's pop LOL) in 2007, as part of a test of a self-imposed self-discipline, it was Diet Coke for me. Diet Coke for breakfast, brunch, lunch, afternoon break, dinner...and sometimes in between! I may have some Vernor's on occasion when I'm not feeling well, but that's about it for pop anymore.
I don't drink soda much anymore but it would be Dr. Pepper. If that is not avail then Wild Cherry Pepsi, Cherry Coke, Pepsi, in that order of preference.
Diet Coke for me. Used to be Diet Pepsi but, now it just tastes too sweet.