McTag
I can appreciate that. I speak at work and home with one type of accent/dialect (McTag has met me so knows how I speak - for the rest of you, assume this isn't greatly different from the way Hugh Grant speaks!)and with cabbies, market traders, misc. Arsenal fans in pubs, etc. I speak a more "London" version of the language (though not exactly "Lock, Stock & Two Smoking Barrels" Cockney!). If my mother happens to be there when I use this alternative register, she can't help but embarrass me by commenting on it.
It just makes life a bit easier all round to do this rather than have accusations of being "lah-di-dah".
KP