My ideal airport is some kind of hybrid between the UK and the USA. The generally efficient, courteous and consistent security provided by private sector contractors in this country with the spacious, open and airy airports that are managed by the public sector in the United States. I.E. No invasive, rude, inexplicable TSA searches, but big, wide, airy terminals, piers and gates where shops are complimentary to the airside experience, rather than obligatory slaloms.