I want to speak elizabethan and/or archaically!
I think it'd be fun! In public or in school (no, not a Renaissance faire and no, not in any type of clothing, just my normal clothes.)
And I don't mean lazy like adding "-th" to the end of every other fucking word, I mean REALLY trying. A few years ago I studied the dialect with the help of an online guide (though to be honest, I gave up at the grammar part), and if I pick it up again I think it would be fun to do, once in a while.
Outside of work, obviously.