I hit the road to see the world that isn't involved in technology. I was in Mountain View, CA, when I moved into the motorhome. I wanted to escape the tech echo chamber for a while. I mostly seek out interesting music and America's remaining wild places. So, I went from Detroit (which has a great music scene, all things considered), to Mammoth Cave National Park, to Nashville. My next stop is Austin. If there happens to be technology, or a conference that's useful to my business, on the way, I'll get involved...but, mostly I'm trying to achieve an appropriate work-life balance, that doesn't revolve around tech.
Ann Arbor sounds nice, and I know Google has a sizable office there, but it's not high on my list of places to visit (no music scene to speak of, no wild places). If one had to start a tech company in Michigan, I reckon that would be the place to do it. But, why start a tech company in Michigan, at all?