My favorite airport in all the ones I've visited is hands down Chicago O'Hare. One of the busiest in the world and the hub of my prefered airline of travel(United). I have flown in and out of this airport dozens of times and I have always had a great experience. The attendents and TSA people are polite and courteous, easy to get to the gates, food is decent(for an airport). I've never lost 1 bag,missed 1 flight or ever gotten lost there.