I got very dessappointed too through the AD's i went! as I posted before, those who didn't smile, were totally informaly dressed, talked very agressive and loud and had no make up or didn't know how to maintain a conversation in english ARE IN DUBAI!!! last AD, the girl who was next to me asked me how to answer the questions the recruiters were probably going to ask her...and guess what...she is now flying!
But if it is your dreem, keep trying...we will obtain it some day!
I heared that some people try it 6 7 .. 12 times! and they got it... i think it depends a lot on the recruiters, how they see you... i am convinced that they cannot see in a couple of hours if you are or not the ideal for the post...it's good luck!
But the important thing is never to give up if it is really what you want!
good luck