Of the start-ups that have approached me my biggest issue has always been that I did not believe in their idea. To really leave the corporate job you have to believe that the idea your working for will work. As the only breadwinner of my family I cannot risk their safety for just any project.
I guess I'm still looking for the idea that drives me through the limitations.
But, I could totally change my mind tomorrow.
I have plenty of ideas all the time, but I don't think any are good enough to put all that work into. I have also found it is tough to think of ideas outside the field of IT - thats where there are all these potential problems to be solved, but as I have never worked there so I don't know about them!
Many of us have had the same revelation: Is this the way I want to spend the one life that I have? Powerful incentive, indeed.