Odd question, I know. I fly a lot, so I spend a lot of time in airports.
I'm particularly fond of Chicago O'Hare [ORD]. Plenty of food and the walkways between terminals are fun.
I also enjoy Long Beach, CA [LGB]. It's super tiny, you just walk onto the tarmac. There's no baggage claim. No jetways. It's quaint.
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Toss up between Atlanta(nice food court, and the delta lounge is nice) and Tokyo-Nagita(lack of traffic/long lines, lax security, and the delta lounge was very nice), followed closely by Louis Armstrong Ariport in N.O.(because its the local airport and I know it well). I absolutely despise the Miami airport though. all the workers are -blam!-s and the lines are ridiculous.