The airports I've been through in the past 14 months or so, in the order from best to worst:
Minneapolis-St. Paul (MSP): Beautiful and clean, with great food. I could live here if I needed to. Also, despite all the TSA bickering that has been going on, I made it through security in under a minute as I was lucky and there was no one in line. I'm not telling you which security checkpoint I used.
Denver (DIA): Also clean and very big; surprisingly comfortable as long as you're in the gate area. However, when I was stranded here overnight due to a delayed flight, I got on the tram to go to the 24-hour Burger King (the only 24-hour venue as far as I'm aware), I was deposited outside the security area in a cold, desolate place with no seat cushions and loud announcements every 15 minutes saying the DHS alert level is orange. There was no going back because it was late and the security check was closed. Also, the food here is terrible, which comes as a bit of a surprise from the city that has given us Chipotle and Quizno's.
John Wayne (SNA): Nothing to write home about; fairly small but clean and better than any of the other airports in the LA-OC area. Also the closest to my house, but expensive to fly out from here. And apparently pilots hate it because they have to do a really steep takeoff due to rich people in Newport Beach that complain about noise.
Phoenix Sky Harbor (PHX): Huge, gate area looks dated, power outlets only seem to be available on the floor in the middle of paths. I was here on a US Airways layover (this is one of their major hubs) and I had to run from one wing to another to catch a connection. Consolidate your flights plz.
Rapid City (RAP): Tiny municipal airport. No one in line at security, because there is no one in South Dakota. Clearly they are not too concerned about terrorism, as a detailed floor plan can be found on their website (including the direction in which the doors in the building open). Rudimentary cafe is pretty much the only food option. Nothing to complain about because nothing was expected.
Salt Lake City (SLC): Surprisingly tiny, but the loop that encompasses the parking lots is enormous. Inside, it's just some airport. No distinguishing features, really.
Los Angeles (LAX): Straight out of the 1970s. I hate this place.
Dulles (IAD): Out in the boondocks. I should not have to take a bus and then connect to a train to get to downtown Washington, DC. Narita Airport in Japan is similarly in a remote location, but at least they have fast, comfortable trains to take me to the city. Hotels in the DC area only have shuttles to Reagan National, but flying in and out of Reagan is expensive.
Ontario (ONT): I walked across the entire gate area and was only able to find one power outlet. Comfort level is similar to LAX but at least LAX has outlets.
On a side note, people, please don't bring foods on board if they're going to emit a strong smell, and please board the plane when your boarding number is called, so the rest of us in the later zones can board quickly...