Have done an enormous amount of travel for business in the US and can't argue with most observations in here about airports. I'm a United Million miler and have had status on United most of my business life. United goes through cycles of quality and el cheapo that just grinds on one after a while. United is in el cheapo mode again now and that makes traveling suck.
That said, here are my nominees for best and worst airports in the land:
Best:
Orlando McCoy -- This one is easy, so long as you have TSA pre-check. Only downside to MCO is the multi-hour wait for security if you don't have TSA pre. Airport is roomy, well laid out and easy to access. A bit of a parking headache at the holidays but otherwise incredibly well done.
LaGuardia -- Since the revamp, this airport is downright nice. Used to be the worst airport in America. Now, it's pleasant. Traffic and waits, both airside and landside, can be a pain, but this is a huge improvement.
O'Hare -- Maybe because it was my home airport for 40+ years, but ORD is easy to get around, connect and has decent amenities. Security isn't too bad either.
Worst:
LAX -- The traffic getting into and out of LAX is preposterous. Best thing that could be done with LAX is to tear it down and start over.
Dulles -- The United hub at Dulles is in a temporary terminal that should have been torn down a century or more ago. Place is a dump, crowded and dirty. United was going to dump Dulles a couple of times, only to find out EWR can't handle the traffic.
MSP -- This airport was laid out in the days when Northwest and North Central both had hubs in the Twin Cities. Connecting in the Twin Cities is a nightmare. It has become better in recent years but the Twin Cities really needs a new airport.