Maybe it’s neat, childish, lucky, ambitious and insane — just depends on what traits gamers choose for their neighborhood of virtual playthings in “The Sims 3,” Electronic Arts and Maxis’ popular life-simulating game for the PC and Mac. Executive producer Ben Bell said it will focus more on social behavior than ever before. “‘The Sims 3’ is a huge step forward for us,” said Bell. “You can create incredibly detailed people who have real personalities that you get to design using a feature we call ‘personality traits.'”