Being casual is great. I am Sydney base and generally get between 120-150 hrs per month, although I do hand in a blank roster so it is proberly easier for crewing to allocate me duties.
Qantas are currenly only hiring language speakers (chinese and japanese) but that could all change.
Money is good, generally clear between 1500-2200 a fornight depending on how many overnights I do.
We don't get staff travel but you can join travel clubs and get really cheap confirmed seats. I guess Qantas want hard-working, customer focused people who are well groomed, same as any other airline. Working for MAM you have to be very flexible aswell, you can only see your duties 7 days out, and even the then they can change. But the good thing is that you only have to work 12 days a month if you want. So if you are studying or want to go on a holiday there's no worries! GOOD LUCK!