Nairobi airport was half burnt down and we were waiting in tents post and pre departure, but I would still say heathrow is the worst (kenyans were atleast nice)...
Or wait, let me redact, worst is Addis Ababa airport, I was in transit for 5 hours, and they didnt accept visa cards, just cash, and NON of their ATMs worked, so I couldnt buy even buy a glass of water, worst and most amateurish set up so far.
Best I'm not so sure, havent been to high end ones, just ok/decent mainly. But I would prolly say Madrid, pretty nice.
But I'm corious, considering I work in an Airport myself, any of you been to Stockholm Arlanda Airport?