I love playing in Sinners Bay (http://slurl.com/secondlife/Sinners%20Bay/5/5/22). I'm heavily into role playing and this sim offers the best of everything, its gorgeous to look at, has a menacing hidden network of sewers and basements, and good gathering spots for meeting the local residents. Even though this is a sim for Adults in which this sunny, beachside town hides dark secrets, there's plenty of different ways to interact.
I particularly love the willingness of the old time residents to take the time to introduce themselves and welcome newcomers into their midst. The quality of the role play here is among the best in Secon Life with none of the attitude that I''ve found permeating some other sims.
I recently took a job as a bartender at the main bar and include a photo of myself contemplating a criminal act. (Something my character constantly attempts but is horribly inept at accomplishing.)
Just avoid big Irish guy who lurks around the sewers and you'll be fine.