One reason when I book intercontinental flight, I check with travel agent and make sure it's not 777, I simply refuse to board this aircraft. There're already reports of defects, even on brand new aircraft (ie: Emirates 777 had one engine blade coming loose during takeoff, causing the engine to explode in Melbourne and aborted the takeoff, Singapore Airlines lost a piece of metal from the engine when taking off from Copenhagen).

The only reason 777 is selling well is due to the political pressure from Uncle Sam toward many countries to order Boeing jets rather than Airbus.