Hmm, the traditional joke made amongst my friends is that my two main "abilities" are actually personality defects. I'm sufficiently delusional about my own abilities to assume I'll be able to pull something off if I try hard enough (how hard can it be?), and then I'm too stubborn to give up once I realise I am in fact in waaay over my head. But the handy thing is that if you plug away at something for long enough, it'll usually work out in the end.
I am quite good at organising stuff, although I'm not especially good with people or anything. I'm reasonably bright, but nothing special. It's just a case of knowing what you want to achieve and then keep at it until you get to it, no matter how hard it is. The business knowledge accumulated at my day job did help, but it wasn't the be all and end all. Generally you've gotta enjoy what you do to do well in it - I wasn't very good at my previous job because I simply didn't care enough.
I don't do art or programming for the reasons you said. I don't think I have the natural talent to do it. So I set my mind to raising enough money to hire people who were naturally talented at those jobs to do them instead. Seemed a more efficient way to do it.