<p>A couple of random thoughts: I had a friend who went to Wesleyan and after two years transferred to Berkeley. I remember being struck by what he said: "The people in Berkeley were grown-ups." I don't know; this is one opinion from one of my very close friends who's actually twisted.</p>
<p>I adore Berkeley, but I think this depends on a couple of things. The first is how stretched will your parents be to support you at Wesleyan? If they are really well off and it's not so much skin off their teeth, I'd recommend going to Wesleyan. The second is if you put together a plan of action to account for the "lost semester," I would look at that very favorably and that might swing me in favor of Berkeley.</p>
<p>My parents met at Berkeley. I went there undergrad. There is plenty that Berkeley offers particularly for someone self-actualized. However, you raise a valid concern about the challenges of the place and getting to know friends after starting late. But you can overcome these if you are good at making friends. The bigger issue, I think, is what you said about discovering a new place and seasons and really culture. Your life will be enrichened if you get away from California and go Back East, in many ways that you can only speculate about now. Trust me on this. And by the way, I'd make the same argument for an East Coaster considering, I don't know, Dartmouth or UVA vs. a West Coast school.</p>
<p>Finally, and on the other hand, a semester or year spent seeing the world would give you a breadth of experiences that could really serve you tremendously. I can't look back at your post quickly, but didn't you say you learned 6 years of Mandarin? So work your connections and get into some kind of program or internship in Beijing for a few months that allows you to take classes and maybe work in a company -- don't teach English. Or go to Guatemala and learn Spanish or something. PM me if you want help or ideas.</p>
<p>Finally, if you want to go into development, whatever element of it you want to do (health, environment, etc.), you will be helped by having international experience, knowing languages, and by learning economics. Berkeley, along with Harvard and MIT, is the top of development economics. But it's rigorous and you want to do the math-focused track.</p>
<p>I think the bottom line is you've got two great choices. (By the way, I've had plenty of friends who graduated from Wesleyan and they were interesting and well-educated).</p>