If we start the hand with 100BB, and we are first to act, then open shipping for those 100BB is not a very good strategy, since good players are just going to fold, unless they have KK or the other AA. However that does not mean, the optimal strategy is to move all-in, since it depends on, how many chips are in the pot already. In general AA should always be raised or reraised preflop, since it is after all the nuts, and putting in chips with the nuts is always +EV.
There are at least 3 different topics in this post, so lets take them one by one: Optimal preflop strategy with AA
