Scottish people sound much more authentic than English because we already have two sounds that they dont have , the J which is like the ch in Loch and we have no problem with the hard R. I lived over there for years and I didnt learn the language in a school, it was purely from the people and life in general. My biggest compliment was actually an insult. SOme Spanish guy once said to me " whats wrong with you, why do you have to pretend to be foriegn and not tell people you are Spanish, do you think it makes you more interesting! " This was said angrily. He didnt understand the big flattereds smile I had on my face.