The triumph of The Big Bang Theory is that everyone is written with genuine affection; what could have been a lifeless parade of stereotypes--Two Nerds and a Hot Chick--becomes instead a charming collision of cultures. The familiar stuff (computer games, comic books, social incompetence) has the grit of specificity; the show understands the difference between Halo and Halo 3, knows what the Bottle City of Kandor is, and grasps the infinite variety of ways in which a conversation can go terribly awry. (Penny gets less nuance, but Cuoco still gives her a distinctive personality.) Kudos as well to supporting players Simon Helberg and Kunal Nayyar, who bring their own variations on geekiness to the table, and to great appearances by some of Galecki's former cohorts on Roseanne--Sara Gilbert as geekette Leslie and Laurie Metcalf as Sheldon's fundamentalist mother. All in all, one of the most winning sitcoms in years. --Bret Fetzer