Regarding accents - I find them fascinating and often ask about an unusual accent. Am I politically incorrect?

In the UK the BBC, for example, has made a real effort to bring regional accents onto the radio and television. In these times of inverted snobbery I always consider my vaguely northen accent an asset and those born with a plum in their mouths find their offspring trading down to what is known as "Estuary English" - Sarf London and lots of glottal stops. Is there the same trend elsewhere?