I thought the new one at Milan was nice. I also thought AMS wasn't bad either. Athens was decent, it was ok with me.
Haven't been to any others in Europe. I have heard many many horror stories about CDG.
As far as the American airports--I really haven't had a problem with any of them either.
Only a minor problem at MSP a couple years ago. Me and a friend went to go get our luggage after arriving at the Northwest gate. Afterall, it wouldn't take long and we could retrieve it before my grandparents arrived. After picking up our bags, we found out that the escalators we came downstairs on did not go back upstairs because all them only moved in the down direction. The workers/attendents at the bottom of them would absolutely not let us walk up them in reverse. Then they informed us we would have to go all the way back around the terminal to get back upstairs, WHILE CARRYING our bags. All they had to do was kindly let us walk up them since it wasn't even busy at all, or atleast switch one of the stairs to go upward. Getting back upstairs took forever.....
767-332ER: You better don your 'flame-suit'. I'll let you borrow mine. You might need it.
It holds up pretty well... lol