Immigration, baggage claim, customs - shuffle, shuffle, yawn. And the same the other way: check-in, security, passport control, with the added spice of passenger anxiety and staff indifference. The airlines fuss over their onboard experience down to the tiniest detail - if only the airport authorities would try to do the same.
In the meantime, there's plenty of opportunity to wish yet again that I had invented - no, patented - this ubiquitous barrier system. I'd be able to afford my own plane then and bypass the whole tedious business.