I can give my thoughts on 3 of the California schools. Bear in mind these are just impressions and everyone sees things differently. This is what I remember.
UCSF - "Campus" consists of a few rooms inside a medical center, and then from what I understand, you take some courses at some other health sciences campus at another site in your later years. Everything's very tightly packed at the hospital...not a lot of square footage, just a few soaring buildings. It's pretty much hardcore, downtown SF and it takes awhile to get out to any other community. The students seemed really busy with their schoolwork and different community projects and clubs that they were involved in. Didn't sound like they had a lot of time to have fun.
USC - Like UCSF, it's part of a medical center, but they have their own dedicated building and the medical campus is absolutely sprawling huge so you're kinda separate from everything else. It's not a great area, but the nice thing is that good, clean communities to live in are just 10-15 minutes up the freeway. The students here seemed like they were spending good amounts of time enjoying themselves and that they were still getting involved in the community and learning a lot. Really liked the vibe they gave off.
UOP - Stockton...sucks. It's just really run-down and depressing. There won't be much to do there. However, I'm sure you can find a decent place to live and you shouldn't fear getting shot or robbed or anything. Pharmacy campus is on the other side of a bridge from the main campus, not really much to it, but that's the case with all of the schools. The students seemed to like the school enough but concurred that there isn't a whole lot to do up there.
You really have to visit the schools to get a true feel for things. 🙂