First, here's a
link to UCSC Home Page. So you can look into whatever it is you're interested in, and see what classes, etc. UCSC has to offer in your field of interest(s).
As for the vibe and place of the campus, it's pretty chill and relaxed. People are pretty lib, and by that I mean just Libertarians and such, but also the good sort. Though, there are some people that might seem cool and chill with your political mindset, but once you speak with them, they're very different from what you expected. As for any radical leftists, there's plenty of them too. I personally know like 6+ self proclaimed Anarchists, and a few Marxists of varying degrees too.
The professors are pretty cool to, but you've got to take it seriously (obviously) or they become serious needles in your side.
The plus side to also living in Santa Cruz is you're right there next to a nice sandy beach. :D (LOTS and LOTS of hot ladies roaming around. And I don't mean that in a weird way, they're just really hot here. :D)
EDIT: Also, Santa Cruz has a nice indie (free from the FCC guidelines and rules) radio station. In other words, a Pirate radio station called Free Radio Santa Cruz. They've been raided by the FCC like two or three times. So they're pretty legit when it comes to fighting the FCC regulations, etc. :D