Fantasy is fantasy. I say keep it. You're not likely to meet any of the actors anyway. Barrowman from Scotland and can put on a Scottish accent when it suits him. Does it strike you as odd that for a show that pretends to be English but has been Welsh for the past 5-6 years stars mostly Scottish actors? I prefer Tennant's native accent. Some people are vaguely attracted to dialects other than their own because they are 'exotic.' I find it attractive because it's a nerdy hobby. I have a bad habit of trying to emulate the kinds of vowels foreigners use. It seems mean or irreverent, but I'm really trying to be affectionate. And people who know me well know that my speech patters (and especially vowels) are in flux, likely to move a half step in any direction by next Tuesday. I play with switching to the non-rhotic r, h-dropping, the ways we use 'got,' &c without meaning to, but somehow I still manage to come off as being from anywhere in the States I want to be from this week.