I love the concept of the strategy of going all in in zoom with certain hands. This can be a good way to sweep up the blinds and limps and maybe even some bets, but whether it is sustainable of not is an interesting proposition and perhaps one that should be tested! Any takers?
Going all in preflop with AA, KK and AK is unprofitable because most of the time, no one will call you and since these hands are too rare to come across, you should rather play them aggresive.
Go all in ONLY IF YOU CALL someone else going all in (and with the pp others have suggested (AA,KK,AK), otherwise make a 3x or 4x bet to get callers and make some money.