Employed vs Self-employed?

How many of you have taken that `scary’ step to give up a somewhat secure paid job to go it alone (or in partnership) and start your own business? What challenges have you faced, and have you received the support of family, friends or even past colleagues? How confident have you felt being your own boss responsible for the overall viability of your company. Do you have any regrets or were you spurned on by the many opportunities that lay in wait for you?  Share your experiences – good or bad