JFK is improving, I'll give it that...
My worst airports I still have to touch are
- SFO: Domestic areas .. Yeah the nice shiny new International terminal is great, but the rest of the airport has the charm of a crummy train station.
- LAX: With the exception of the AA terminal, all other terminals are really dated now. Even the Intl/Bradley terminal is horrendous airside (landside, it's great)... The UA remodel a few years ago doesn't look like anything ever happened. I can't believe all the money was spent and it looks 10 years old already. I also don't believe the Mayor's plan will EVER see the light of day.