Bulletin Today | Personal HealthWarm weather, as well as opportunities to stay active and maintain a healthy lifestyle, are the reason southern and southwestern cities dominated on Forbes’ new list of best places to retire in 2012. This year the magazine expanded the list from 16 cities to 25, located in 18 states. Reflecting what retirees say they want, the roster is heavier on warmer states like Florida, New Mexico, Texas and Arizona. Only about a half-dozen cities are located in chillier climates, including …