I'm personally very fond of Sudbury, Wellesley, Newton, (parts), Chestnut Hill, Plymouth, and Danvers. I've lived in Brighton, Braintree, Boston (Riverway), Cambridge, Salem, and Peabody, and while I personally never had many problems outside of riding the "T" late at night, (robbed and attacked more than once), and Cambridge, (car stolen), they aren't quite as safe or nice as the list I started with.