If you could start just one company…

…what would it be? I always have a number of side interests simmering, everything from test projects to learn and evaluate new technologies to full-fledged projects and business ventures, not to mention the after-hours time spent on my day job. So it strikes me the other day – suppose I had all of this time and spent it on a single venture – one go-for-broke venture that I put all of my effort and thought and passion into. What would it be? So far, I don’t have an answer, but it makes for a compelling question.