Batman may seem like a super serious guy, but he just acts that way in order to strike fear into the hearts of Gotham’s evil-doers and ne’er-do-wells. In reality Batman is a real blast- he invented the Batusi, loves to surf, and he really knows how to celebrate the holidays.
Check out his guest starring roles in classic Christmas movies like A Christmas Story, The Santa Clause and It's A Wonderful Life, and watch him totally screw up Christmas scenes from such films as I Am Sam and Love Actually. It's surprising that anyone takes him seriously at all after seeing him screw up the lines in such iconic Hollywood movies! (NSFW due to language)