It gets my goat to be addressed as "Stephen" by perfect strangers - often as not PRs.

When I was a cub City reporter I sat next to an old hand who used "Sir" and "Madam" when on the phone.

I adopted this style for many years until it seemed just too old-fashioned but I never dream of adopting first name familiarities.

Americans and continental Europeans use the polite forms and I wish we did too.