What is a word pronunciation that you really like but, unfortunately, is only used in an accent that’s not your own so you’d sound really weird if you started using it?

I like how nice and fancy Americans make the name “Bernard” sound. With an American accent, Bernard is probably a professor of art history who spends a lot of time at the opera. With an English accent, Bernard is your local odd-job man who spends a lot of time in wetherspoons.