I agree with the comment that LGA has gone from one of the worst to one of the better ones after all the updating. I'm impressed especially with how terminal B turned out. The building process alone was impressive to watch over the years. Now, if I could only find a sit down restaurant at LGA that costs less than $100 for two people (only a slight exaggeration).
Two airports not in the article probably because they would be considered smaller are MDW and DAL. Two once cute and convenient airports which have become crowded and burdensome. The restaurant choices at MDW are the worst in the country, IMO. We will see what happens with the remodeling going on now. And DAL was built with restrooms that weren't designed to handle high capacity.
Vegas is a mixed bag. If you are flying on AA or Hawaiian you are in the nice new terminal area. If you are on SWA you are in an overcrowded, rundown maze of gates.
DTW and MSP so high on the list? Really? And, I guess I've been lucky with PHL as I end up at the new AA gates with the nicely designed Admirals Club.
The comment about happy travelers spending more money at a terminal made me laugh.
Random comment: Which airport has the funniest airport code that even locals complain about and have tried to change? Sioux City, Iowa. Yep, the code is SUX. No traveler needs those letters on their boarding pass.
Finally, I know it is North America, but could someone please duplicate the sophistication, comfortable, and natural environment of Singapore's airport.