I consistently run into young adults who have quickly turned away from traditional jobs at great companies to try their hand at a start-up. I believe that some of this stems from the desire to strike it big like Mark Zuckerberg, but I also believe it is because starting a company has become far cooler than working in one.
I remember when being a 'a company man' was a badge of honor; today in Silicon Valley it may brand you a loser or, in the best case scenario, someone afraid to take risks. Ten years ago, if you saw a resume that had multiple jobs in ten years, you would be worried about the capability of the individual. Not so now.