They generally have trouble with authority and are vocal if they do not agree with the way things are done. Be careful, though, a continuous history of firings can mean that you have a serious personality problem which could also be a hindrance in attempting to run a business. The most pervasive characteristic of entrepreneurs is that they do not like working for someone else. They like to call the shots themselves. They also tend to be extroverts who crave recognition.
Money is nice, but of secondary importance.
Many, if not most, entrepreneurs have started more than one business. Failure is a very real part of being an entrepreneur. It is necessarily that an entrepreneur be resilient and able to bounce back - even in the face of a total loss. Contrary to popular belief, entrepreneurs are not big risk takers. A small business owner has to manage people to be successful.