Ahm reet wi Bill on thisun.

I don't think that an affected accent realy works. There are one or two people who can get away with it but it is rare. My Grandad had a 'proper' Lancashire accent - I can still hear him in my head to this day - and for me to try the same (as above) would be totaly wasted.

Yes - do dialect words, but try and do an accect that is not yours and you will look a complete prat!

Just my opinion.

Cheers

DtG