Last year i put a couple of posts together on the best and worst airports i have been to. While i didn't do much traveling this year, there are two clear additions to my lists:
Best - Barcelona [BCN]
Terminal 1 in Barcelona is what Terminal 2 in Charles De Gaulle should be; BCN has the same open light feeling as CDG, but with a host of decent shops, restaurants and executive lounges. Security and check-in was nice and efficient, plenty of seating near the gates and theoretically there was free wifi though i couldn't find it.
Worst - Schiphol [AMS]
Ok it's not as bad as the Top 5 Worst, but i would still avoid transiting through it again if possible. The first issue is that it is a single terminal, normally this is a good thing, but when it is one of the largest, busiest airports in the world, that means a lot of walking. Maybe it's just because i had a sore foot, but it seemed like i had to walk from one end of the airport to the other for my connecting flight. I also found it quite difficult to navigate, not sure if it was the layout or the signage, but it seemed like a lot of concentration was required. The only upside was that all of the staff - even security - were very friendly.