It was my first time in the US. I think there is no other country that I have heard so many things about before I visited it. Burgers, big cars, fat people, good wine and fantastic cities. For sure the real experience was quite different. Although you can find all these things there, you will also find many other things to discover.
In Los Angeles, I stayed at a place where they even produced home-made videos. I always thought in Hollywood only movies with lots of money are produced. But in this place, even parts of the living room were functioned (运作) into a scene. But anyway, this shows what you imagined about a place before arriving might be totally wrong. Now I started to understand the city is not only the place where the big movies are made, it's also where people are crazy about movies, and always try to start a production even if they don't have lots of money. People there just really love movies, they are motivated (调动积极) to give their ideas a try and at least open up a channel online with their home-made stories.
Of course, there are many other interesting places in Los Angeles. As I stayed only a few days, it was not enough time to see all. But I advise you to have two apps on your smart phone for traveling in America. First is Yelp to find the closest and best restaurant or coffee place. And the other is Uber because especially in Los Angeles, you won't find taxis and everything is so far. You can also drive but it's wise to park your car close to a subway station and go to Hollywood by subway.