i am more inclined to 4 bet shove with AK, especially oop. situation 2, unless he is a huge nit i just ship it in. im not a big fan of 4bet/folding, unless were deep or have a really good reason. situation 4 im shoving. i mean all these are so read dependent as wufwugy said, and you didnt offer any reads.

in relation to ash256 and hybrid's arguments -
ash, if you are inclined to fold AK as often as you say, then you are just unbelievably nitty, and probably really exploitable preflop. i wonder how you play QQ in these situations mentioned. i didnt read the really long posts, but hybrid you actually appear to be right imo, but people would receive your message much better if you werent being such a douche about it.