Cheers for the link M3boy
My rule of thumb is I only re-raise with AAxx type hands if..
1/The raise would be large enough to get 70% of mine, or all my potential opponents, stack in before the flop.
AND
2/My AAxx has to contain at least one suited ace.
i agree with rule 1 i dont with rule 2
my rule 2 is only if i feel i can get the hand HU as the value of AA goes rapidly downwards when you are playing more than 1 oppo so rapid that it becomes a -ev play