Funny, I always wondered why MI homeowners used concrete for driveways. The norm here (400 miles east) seems to be asphalt, I think we have more asphalt roads as well, so climate is not the rationale. Maybe a local preference or material cost/availability, don't know.
My own is asphalt, done in '79 and now needs replacement; 20-25yrs seems the usual for homeowners, 30-35yrs for local roads which start with a better quality.
Pros and cons seem to be covered above so assuming cost diff minor it's probably personal preference.
Thanks for everyone's advice. We should be filing the papers this week for court. I think we'll definately be going with concrete. I was just curious as to everyone's opinions. I just want a solid driveway again!