all-in pre-flop hands

[Nate 0]

For the past 2 NL HE tournaments i've played in, i've busted out going all-in preflop with hands like AK and AQ.The time i had AK, i raised pre-flop and my opponent re-raised big. I then pushed all-in and lost to a JJ. My chip stack was about average, but my oppenent's chip stack was 1.5x bigger than mine. A similar situation happened with the AQ. I now realize that was very stupid, and don't beat me over the head with it.So i'll ask the question this way...What hands would you go all-in on preflop with a dangerously short stack (5x BB), against one other guy who raised?What hands would you go all-in on preflop with an average stack, against one other guy who raised?What hands would you go all-in on preflop with a huge stack, against one other guy who raised?