What are the best and worst airports you've visited?

The most modern and best airports I've been to are all in Asia. Hong Kong International, Singapore's Changi Airport and Seoul's Incheon Airports are the nicest I've seen and are probably the three airports that win most "best airport in the world" awards. Amsterdam's Schipol is one of the nicest in Europe. I think SFO (San Francsco International) has become one of nicest in the US. I would put JFK and LAX at the bottom of my list, both are rundown and dirty, and I think LAX has the least courteous neo-Nazi customs officers I've ever had pleasure (sarcasm) to deal with.