I’d count UCD out, those cons are too big. There’s one hospital in all of Davis and the medical center is in Sactown–UCSD and UCLA have top-tier medical centers right on campus. Regents is a great perk and SD is an excellent school for premedical studies. Your only cons there seem to be the socially dead issue, but let’s be real being premed means you’ll be dead inside no matter what. As a current student I can also tell you that while the party scene isn’t in your face like it is at the other two schools, it definitely exists and as long as you make an effort to talk to people you’ll be able to find things to do every weekday and weekend.