I don't travel for leisure, so take what I saw with a grain of salt. I mostly rate airports based on ease of security. So I rate DFW and NRT higher than, say, VPZ, because I am not forced to use scanners at either. Beyond that, I'm really interested in airports that have decent shopping and food options. (NRT of course gets dinged there for the abysmal dining options past security and immigration)

I don't much care about on time performance at a particular airport, especially for business travel - if I don't make it somewhere because the flight was late, I don't make it. My vendors and customers aren't going to hate me because I chose an airport or airline with poor on-time performance.