Harbor was the only place I actively disliked. I just didn't vibe with the place, and the schedule is just too weird for me. Some may like it better though, especially those really interested in moonlighting (I'm not).
I actually really liked Loma Linda. Great program, friendly people, and close to Big Bear where I used to live and play. I would have ranked it higher but my fiancee decided she wouldn't really want to live out in Redlands/Loma Linda, and so I gotta respect that. I'd be more than happy to end up there though, I have nothing but great things to say about it.
USC>UCI just for location. I liked them both a lot. USC seems like an up-and-coming program, and UCI seems to have rebounded from its administrative issues, at least in my relatively uninformed opinion. Happy people at all of them (the ones I ran across anyway).