Coca-Cola - the original and best, has the right mix of sugar and acid bite
Dr Pepper - actually not my favorite despite everyone else seeming to love it in the area, though the PCS version is fantastic
Pibb Xtra - like Dr Pepper but with less flavors, which actually clarifies the cherry/"spice" flavor and makes it overall better, even if my Dr Pepper friends say it's heresy
Cream soda - Novelty, don't know if I'd even be able to finish a whole can
Ginger ale - okay, it's always a safe bet on airplanes and parties but not something I'd buy cans of or at a restaurant
Pepsi - only superior to Coke if you valued sugar above all else, would never be something I'd get normally
Mountain Dew - tasty but probably because I was denied it as a kid (again, go with pure cane sugar)
Mountain Dew Pitch Black - tried it when it returned a few years ago, and it's great even if it is novelty, basically a superior grape soda
Crystal Pepsi - novelty, tastes like Pepsi with some of the flavor notes missing (and unlike Pibb, doesn't work in favor)
Squirt - decent, but feels more like a mixer for alcoholic drinks
Sprite/Mountain Dew Sierra Mist - never compared the two side-by-side but never a big fan of either
Root beer - Overly strong, sugary flavor that doesn't seem to complement anything, though some versions are better than others
Moxie - starts out as an interesting root beer variant, then packs an incredibly bitter punch for the aftertaste to the point it's not fun
Cel-Ray - started out as a novelty, used to love it unironically, now I'm not so sure anymore
RC Cola - tastes like flat, generic "cola"