Stuff with real sugar tastes pretty good. I can't drink anything with high fructose corn syrup anymore. It tastes rotten to me or, like it has expired. I'm trying to avoid anything with sugar, though. I do drink the occasional Zevia when I avoiding diet soda. Those are fairly tasty without being addictive like other sodas.
I've been drinking some Propel with electrolytes lately. Keto tends to deplete those. Any sort of fizzy water is pretty good, too. I like Perrier, La Croix and all those, but I have looking for generics or cheaper brands, too. sparkling water can be more expensive than pop.