@centrox,
centrox wrote:. . . like a British actor (which he is) doing an imitation of what Americans think a British accent sounds like.
This is it in a nutshell . . . what you get on either side of the pond is people who are reproducing the stereotype of an accent. There just isn't one accent, in either country. People from Hexam do not sound like people from Exeter, and people from Savannah do not sound like people from Minneapolis. There are such a wide variety of accents in both countries (in all countries), that unless you can absolutely nail a regional accent, people from the country whose alleged accent you're attempting are going to spot you right away.
There was some television production of a Dick Francis novel and the presenter was just gushing over a young English actor who was playing an American. Sorry, he was totally unconvincing,
and he lacked a regional accent, which of course, all Americans have. I knew a young woman in a university drama program who was to play an Englishwoman in an upcoming production and who therefore went around "doing" the accent day and night. She was awful, and in large measure because she didn't sound like she was from any particular region.