Late to the party on this, but...
Few things are better with a hangover or indigestion than a cold Coke Classic.
I love Dr. Pepper, Ginger Ale and black cherry soda.
Having said that, I rarely drink it, as the sugar is ridiculous. I quit coffee cold turkey back in November, and I notice I cheat with soda more than ever, though I'm conscious of it and am trying to cut down again.
I personally think soda is evil, and DIET soda is the devil incarnate. I get that it's not entirely rational, and studies are inconclusive on this point so far, but I am totally and utterly convinced that future generations will tie both increases in cancer and obesity to the explosion of diet drinks. It's just a can of chemicals. I'd much rather drink water, or if I need that "palate cleanser", a glass of wine or seltzer with a hit of vodka and a splash of cranberry, pineapple, Fresca or ginger ale.