Agree with the above about Harbor. It's a fantastic program on its own, and if your interests are in community psych and working with the underserved, I don't think there is a program to match it. When I interviewed there, I had a few great connections with the residents, and I loved it. It was very high on my rank list. The area is not particularly bad, either. Well, maybe if you're the podunk cornfields in Iowa or whatever and non-white people scare you, but it's otherwise a wonderfully diverse, working-class area of Los Angeles. Two drawbacks for me were that you can't start moonlighting until PGY-4, and, even though the residents were very committed to the population they serve, many of the graduating residents were going into private practice due to burn out with that system/population.
UCI is a bit of an odd bird. They keep a very low profile, somewhat intentionally for some reason, which does the progam a bit of a disservice, I think. Surprised nobody has mentioned the call schedule, because it's kind of famous. It varies by which rotation you're on, but short call is maybe 2-4 per month, 1-2 weekend calls (12-hrs) per month. UCI is also known for being a very laid back program; I can definitely corroborate this. Everyone (residnets, attendings, admin) is incredibly helpful and friendly. Lots of VA, but there are programs that definitely rely more heavily on their VA than UCI (UCSD, for example). You can moonlight as soon as you're licensed in your second year.
I know how hard it can be to get useful information about programs other than the big few, so best of luck.