Kal - it depends on where you are based and what your needs are. Unless you are based in Australia, you would not be able to accrue any miles (or kilometers as in the case for the Aussie programmes here), on MH or SQ. Besides on AN, you will only get 70% of the mileage on certain types of fares.

As far as I know on Ansett's programme, since they joined STAR, the rewards on sticking to this programme has taken a nosedive. There are no oneway awards to Australia available. Oneways can only be taken FROM Australia and only onto Ansett International's destinations, which are just, HKG, TPE and KIX.

The only advantage to Ansett's programme over Qantas is the car rental agency's tie-in on dollar spent for miles. AVIS will award 5 points per every AUD$1 spent on car rentals worldwide.

Hope this helps.