Have you ever loved a show so much that you try to convince people who don’t watch it to tune in and try it out? Do you harass friends who don’t even fit the demographic of a program because your passion for a particular show is so great? “Game of Thrones,” which returns for its third season on HBO this Sunday, is one of those shows, at least for me. Of course, as I’ve come to find out, “Thrones” is for a particular audience. If you don’t like swordplay, multiple storylines, political maneuvering, nudity, and dragons, this show isn’t for you. But if you enjoy series’ like “Spartacus” and “Vikings” you’ll love the much deeper and more complex story lines in “Game of Thrones.” See, here I am trying to convince people again.