<ol>
<li><p>There are a lot of Asians. Blacks are rare (students anyway--Berkeley itself is very, very diverse). Whites are not. State law prevents affirmative action, hence the situation.</p></li>
<li><p>The atmosphere is quite friendly, actually, in my opinion at least. There are a lot of nice people at Berkeley and a lot of social groups for you to get to meet them in.</p></li>
<li><p>I've never felt competitiveness personally. However, my disclaimer is that I've been doing pretty well relative to others, so that may be why. I think the general mood is actually quite relaxed.</p></li>
</ol>
<p>In general, there are some unpleasant people, but there are a lot of great people here, too. I mean, in any group of 20,000 18-22 year olds, you'll find a spectrum of people. Anyone saying all are unequivocally awesome or mean is lying.</p>
<p>Asking how Berkeley is is a pretty vague question. Berkeley, as a city, is dirty and run-down, but extremely diverse and cultural. There are a huge number of students, which means you will almost certainly find a group of them that you enjoy hanging out with. In general, I feel that Berkeley really ends up being what you make of it (and I feel this way about most colleges).</p>
<p>If you like a big campus with lots of people, Berkeley is great. If you want a 1,500 student school in suburbia, maybe Harvey-Mudd would be better. If you like clean, pristine streets, Berkeley probably won't be your cup of tea--try UCLA, if you don't mind a more Hollywood attitude and feel. As you can tell by reading what people post here, some people (inevitably) love Berkeley and some hate it. Don't take either camp too seriously without experiencing it first--visit if you can.</p>
<p>Actually, if you know a Berkeley student and can spend a few days in his dorm/apartment, that'll really get you a feel for Berkeley. If you can't and have to rely on what is said on forums, well, I can't guarantee you'll like what you receive. I would say, though, that if you're open-minded, you really can't go wrong anywhere.</p>