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I wanted to get a vote in for a local American airport: PIT, Pittsburgh International Airport. It has a beautiful terminal built in 1992 with tons of good food available, excellent by airport standards. Last time I was there, I couldn't get over how clean, sleek and new the whole airport seemed. Lots of nice shopping, too, and plenty to do during layovers.
Also, I was recently at Jorge Chavez International in Lima, and was very surprised by how easy it was to find my way around, how much English was excellently spoken by much of the staff, and how efficiently baggage check and security were run. My companion and I both expected LIM to be absolute mayhem and to spend hours figuring out how to get from place to place, but we had no trouble because everything was so clearly marked and the staff was so helpful.
And I heartily agree with those lamenting CDG's existence. I've flown in and out of there at least 12 times, and it's the only airport I've ever been to in my life where I've gotten there 5 hours before my flight and actually used every minute of that time moving from terminal to terminal, waiting to check in, etc. Enormous, poorly marked, very hard to find your way around if you aren't familiar with the place. Gargantuan, poorly laid out and very, very ugly with its attempt at "modern" design.