Your Favorite Letter You pick your favorite letter and together we build a word. na 2010-02-21T12:00:00Z Your Favorite Letter info@yourfavoriteletter.com Round one's complete. Time to pick another letter. na 2010-02-21T12:00:00Z J was the most popular letter in round one, with Q and Z finishing closely behind. What letter will come next? A, E, I, O, and U are the options. Please take a second to let us know which of those is your favorite.