LA sucks.. but the beach is nice. and San Diego and San Francisco are nice.
Where in LA have you been? It's an acquired taste, I guess, but I actually love that city.
San Diego is indisputably beautiful.
I have mixed feelings about San Francisco. I lived in the Bay Area for three years and couldn't stand the weather, the filth and the prices. But the food, the culture, the nature and the education was incredible, so it was well-worth it anyway.
People in LA are no more arrogant than people anywhere else. trust me. the whole hollywood thing ruins the rep of the other 90% of the population.