Actually, car rental in Los Angeles is a prerequisite for survival. Going on vacation? Do you want to spend it not only with benefit, but also as much fun as possible?
Most likely that after a long flight, the last place you would like to be is a typical stand of the rental office, where you will be given the keys to a simple Ford Focus or Chevrolet Cruze, on which were travelling crowds of Chinese tourists. Besides, if you want to stand out or are unlimited in budget, you should think of something better.