When you have to do all the more crappy jobs before, you appreciate all the good work that comes out of that. There are many girls who immediately have a top model career, and there are lots of models who are doing things that aren't as exciting as doing big campaigns and beautiful magazines.
There comes a point in your life when you realize how quickly time goes by, and how quickly it has gone. Then it really speeds up exponentially. With that, I think you start to put a lot of things into context; you start to see how huge the world is, and really, the universe.