Expectation for LA

I decided come to U.S last year. I applied for MBA degree in Fremont one university, and it is near from San Francisco. I've seen San Francisco from some Hong Kong movies before. So, before come to U.S I already had an image of San Francisco. And actually there's no big diffirences. And I thought LA is progressive city, so there must be a lot of buildings and a lot of people are walking around. Also, I thought that people are very friendly and educated. Surprisingly, LA has very little buildings(if compare to BeiJing China) in downtown, and you will hardly to see people are walking around. People in LA come from diffirent nationalities, so their cultures also are diffirent. Maybe because of this diffirence, I couldn't feel they are friendly and educated. There are some diffirences from my expectations, but some have been true like weather is hot(now a little cold in the evening), and the location is good for access to other places.
I've been here for six months, and I'm trying to go along with here's people and get use to stay in this new place. I hope I can achieve my goal in the United States.