2005 - This is another one of my "airport" states. My three "most visited" airports are: Atlanta (I live there), Detroit and Minneapolis. At the time of this writing my primary airline is Northwest (NWA). NWA operates two major hubs in Detroit and Minneapolis. Because of this, I've lost track of how many times I've been through that airport.
At some point, if my layovers are just a little bit longer I'm going to venture out and see the Mall of America.
There is a terrific Canadian themed bar at the airport which is terrific to unwind before or after a long flight. I forget what gate it's near at the airport, but it's very close to my usual departure gate for Tokyo.