Singapore Airlines topped yet another industry ranking this week, and while it usually deserves the awards it wins, there are a few aspects of the way it does business that drive some customers and partner-carriers crazy. Still, don’t expect those practices to change anytime soon.

The latest awards were bestowed by Britain’s Business Traveller Magazine. Singapore was named best airline overall and also won best economy and business class. Best first class went to Emirates, probably because of the shower on its Airbus 380 aircraft. I have yet to meet anyone who has flown Singapore and didn’t like it, regardless of which cabin they were in. It has long been the world’s leading carrier in hard-product innovation and luxury, often years ahead of its competitors…