i always call, and sometimes ill 4 bet QQ. it also depends on where you are raising from, because if you're raising otb, villains 3betting range will be much wider than if you raised utg. as far as postflop calls, i call w/ JJ, and i call with QQ. vs an unknown if he bet/shoves a blank turn, i probably give it up, because you are also unknown to him, so he has no idea if you like to slow play aces, or slow play sets, or whatever.