DFW: Changing planes here is a huge pain. The tram in the AA terminal was so slow I almost missed my flight
ORD: I avoid this place like the plague. When you fly out of ORD, you don't ask yourself if your flight will be late, you ask yourself how late will it be.
LGA: Too crowded for comfort. A disaster waiting to happen.
PIT: Every time I've connected in PIT (3 times), my flight was cancelled.
CVG: Nice airport, well, the Delta terminal anyway. The rest is crap. Easy connection unless you are connection requires a switch between Delta and Comair.
CDG: A very nice airport. Been there several times, always loved it. There is a TGV (French Bullet Train) station right at the airport, which is really convenient. You can get off your flight, and go downstairs and get on a train to go anywhere in France. CDG also has a large variety of airlines.
LAX: The United terminal is really nice now that they finished all of the construction. It had a great variety of airlines too.
SNA: Fun takeoff. Quick and efficient layout.
IAH: How can I leave my hometown airport off the list?
ONT: New and modern airport, but is underused. I liked the old airport better though. Boarding/debarking the plane via stairs was always a treat.