I'm going to give you a quick rundown of the countries from the view of a 22-year-old:
Mexico: The interior of the pyramid is beautiful, and there are great gifts inside, but some I don't know if I would travel with (fragile).
Norway: The Maelstrom ride should be longer! It’s a great ride and I do recommend it. I do find it funny how it lets out into a Norwegian gift shop (just like Disney, as every ride lets out into a gift shop). Take a picture with the giant troll!
China: The area is slightly small, but they do have some very beautiful jewelry, tea sets, and a "street market." Try to catch the Chinese acrobats!
Germany: Oh dear, Lord, eat their fudge - you must do this - and the chocolate covered pretzels. Try the beer just to try it, but if you are a girlie girl like me and don't care for beer, ask for the lightest one, but if it tastes obscenely bitter, don't blame me.
Japan: They have great gift shops and even sell bonsai! There is beautiful scenery as well.
Morocco: I got a henna tattoo! However, it smells very strange (the pavilion, that is).
Italy: I love it. They have beautiful gifts, from Venetian masks to Italian wine, and the restaurant is lovely.
France: I noticed that the employees are slightly snotty, but I found this pavilion to be the most beautiful. Don't forget to catch the Living Statue!
England: Jolly ol' England – it’s so lovely with its Tudor-style architecture. You can find Winnie the Pooh here! Grab some fish-and-chips!
P.S. I think they definitely hire the most gorgeous people from each country to entice you into buying every useless gift possible.