Among the big ones I like Schipol, in Amsterdam, for killing time. Lots of stuff to do. For jackboots with a sense of humor, I like Logan International, in Boston. It's the only one where you can actually tell politically incorrect jokes to them while they probe you and get a smile out of them. I've noticed this again and again, over many years. Most places hire TSA agents with absolutely no sense of humor. Logan is a refreshing change from that.
Hmm, I had sort of the opposite experience at Logan. Not with the TSA, but US Customs interrogated me, basically insinuated that I was either a heroin smuggler or had used heroin abroad (wut), and finally let me go after a solid 20 minutes of pointless dick waving. Same thing happened when entering the US through Sarnia-Port Huron; our beloved border protection service really doesn't like it when I come back home.