I'm always pretty satisfied with KLM . Apart from that one time in 2000 when they overbooked our seats and we had to wait for the next flight to New York we could get on. We got the flight for only 50% of the price we originally payed and we got meal vouchers... But we ended up on some dodgy Eastern European airline which seemed to have more people on the plane than there are actually seats... And our luggage arrived at JFK Airport a couple of days later.

Singapore Airline is IMO the best airline. Friendly people, pretty good food, a trustworthy airline. And Singapore Airport is the best airport to spend a night waiting for a connecting flight; with unlimited free use of the internet booths during these hours! And the monorail between the terminals is quite fun to spend time on while you're bored...