I fly Emirates whenever possible. Mainly because of their excellent customer service. However, I have observed people who behave badly in that they think if they yell or wave their arms about they will get whatever they want, rather than acting in a reasonable or adult manner. Not saying that any of those who have had problems weren't polite and behaved professionally. Some of the worst I observed were a group of Americans boarding in JFK - cutting the line and "expecting" to be able to put their back packs (obviously oversized and overweight) as carry on luggage. They weren't impressed with Emirates, I wasn't impressed with them.