* FanNickname: David [[BiggusDickus Ten-Inch]], courtesy of Creator/BilliePiper (though John Barrowman certainly helped matters).
* HilariousInHindsight: In his interview before ''Film/HarryPotterAndTheGobletOfFire'' premiere, he mentions that he will never have a [[{{Series/DoctorWho}} this big of an audience again]].
* MemeticMutation:
** "Allons-y!" amongst others like "I love a little shop" and "I'm sorry. I'm so sorry."
** [[Creator/JohnBarrowman BARROWMAN!]] [[Series/NeverMindTheBuzzcocks *shakes fist*]]