Make sure to listen to people who know what they are talking about. I am a UCSD resident and can speak freely about its qualities and drawbacks, as far as scripps mercy is concerned that is the holy grail for slacking transitional years, and ANY where would make them appreciate their little microcosm of easy living. As far as some of the folks who left, one went to Northwestern for spousal reasons, and another was not asked to return, at no point was there an exodus. This past graduating class had the 3rd highest IM board scores in the country and highest out west.
We love it here, great environment lots of work, but also autonomy, and even better fellowship placement. Most of us chose to be here over high faluting east coast programs because of the patient population (immigrants-county patients, transplants, BMT, HIV, and VA guys) NO where else on the WC can you find that. Make sure you take anything you hear with a grain of salt and figure it out for yourself.