I vote for DFW. Before they changed it (1999?), they had 2 car rental plazas- one north of the airport, one south. 75% of pax used the North one. When they consolidated, guess where they put the new one? You betcha. The South. And it's a big airport. Naturally, my destination was my company office north of the airport.

The tram doesn't go there but it's just as well because it's so s-l-o-o-w. Dave Barry once wrote that Amelia Earhart is lost somewhere on the DFW tram system.