There's an absolutely brilliant piece over at Alice Bachini's about how talking in a foreign accent makes you into a different person. Commenter number one is me saying do please finish this because it's terrific, and introducing a few changes of subject by way of encouragement (I hope). And commenter two is saying how right it all is, with examples, this time of people who are switching entire languages. Even if this piece ends now it will still be wonderful.

UPDATE: She finished it, with a description of the specific vibes given off by an American accent, welcoming, optimistic, confident, etc. Another commenter agrees.