Great article, finally something worth reading fully on here. As a serial entrepreneur this definitely hits home and is something I've had to learn the hard way over my 17 years of entrepreneurship. Just because you come across a great opportunity and you have the skills and gusto to make it happen doesn't mean it's a good fit. If you don't give a shit about the idea/problem/market it doesn't matter if you are good at every aspect of the business, it will be a slog and you just won't care and will set yourself up to fail sooner or later.