Being a Scot, I am only one in a whole nation of accent-imitators! I betray my age here, but I can remember all the would-be Gene Autreys, Bing Crosbys, Littls Richards, and so on right down to the Sinatras and Beatles . Hank Williams' stuff is jokingly known as "Glesga Country and Western". On the folk scene, I regularly give nodding acqiescence to the Irish tongue when I use Irish material. I was many years in "Geordieland" and am able to pass off many a Tyneside ditty in a decent Geordie accent. [I would draw the line at "the Lambton Worm", though!]. I am much more likely to shudder at the attempts of professional actors in their delivery of what they fondl;y imagine is a "Scottish" accent.The lone exception to that is the almost perfect use of a scottish accent by Robin Williams in "Mrs. Doubtfire". I have since learned that he thought he was using an IRISH brogue!