I prefer AK, it gives me a better chance to win the pot, it also depends on turning over the table, I've already lost to smaller pairs holding AK.
JJ is also sensational, especially without
hands up, or when you have a good amount of chips, for me JJ gives more security than AK this pre-flop.
We know more that holding AK or JJ we depend on the cards that come on the table to make our game and intimidate the other players.