A mutant child of the Sidecar and the Cape Codder (a vodka-cranberry-lime concoction with little to distinguish itself beyond '80s nostalgia), the Cosmopolitan was the theme drink of the 1990s. Like Celebration, Florida (the Disney town), it has the appearance of tradition with none of the workmanship. The purpose of a cocktail is to take the pronounced, even pungent, flavor of a liquor and, through careful blending with acids, aromatics, and essences, transform it into something new and hitherto-untasted. Vodka, though, has no flavor. If a cocktail is alchemy, this is just mixing.TBA always has time for vodka-bashing.
... Re: the sidecar, meh: if you like citrusy drinks, then okay. Tho perhaps faking it with Christian Brothers for cognac and triple sec for Cointreau isn't fair to it.