Look at an airline like SQ that has the highest of standards in FAs - and thus some of the highests levels of customer satisfaction.
1. ALL of them are SIN based - Asian and basically most are either from Singapore or Malaysia.
2. ALL of them are employed on exactly the same employment terms.
Talking to them on a few flights to Europe and I explained the circumstances at QF and they way they employed FAs they simply couldn't believe it. Think of the costs to an airline like SQ in overnighting crew in London with 3 A380 services a DAY (some days), but they still do not have crew based there. And further to rumours thrown around SQ FAs do not share hotel rooms.
Some of them deep down might not love their job, or the company, but it NEVER shows in their attitude to the public, the airline is doing very well and it's because they invest heavily in new aircraft, and their service is second to none mainly due to the fact of the reputation around the world of excellent service from the 'SQ girls'(and boys).