That taste of America chocolate you are complaining about is from Hershey's. They also have always made the chocolate for the Marc candy company.
Notable exceptions to Hershey's are the Ghirardelli chocolate company of San Francisco, and Guittard. Neither uses the same processes that Hershey's uses, and so produce different flavors to their chocolates.
Most of the small boutique chocolatiers in America do not process their own cocoa beans, and so have the flavor of chocolate of whichever mass producer makes their stock. They usually purchase chocolate in 10 pound bars. They look like a regular chocolate bar, just super-sized.
There is a movement in America that is doing for chocolate what has been done with wines, or coffee, varietal chocolates. Each little region produces beans that are not mixed with beans from all over the planet, but are kept separate. This has the effect of not having a standardized flavor.
Be grateful that sugar and not human blood is used in the making of chocolate today, as it was done by the Aztecs originally.
