For me, AK is just like JJ. I never seem to win with them unless I go all in pre-flop. Usually when I go all in pre-flop holding these starts, everyone folds. There are occasions where one brave soul steps up to the plate. Luckily its because he also has an A with a high kicker (J or Q). Generally in that scenario, all small cards show up or my K actually shows up. Either way I'm the winner.
Whenever I've tried to limp with AK, AA even for that matter, I never win. Im basically thinking two things when I get AK - fold or go all in.