The airport isn’t exactly a glamorous experience these days. As you jostle through the TSA line or fight past the “gate lice,” you wonder: Has everyone forgotten how to behave while traveling? But if you travel enough, you probably know what makes a good airport — one where delays are seemingly sparse, public transportation is plentiful and the restaurants are actually good (at least for airport food). Tell us about your favorites in the United States, from the big hubs to the unsung regional heroes.