Pocket aces equal the best pocket pair and pocket deuces still equal a pair. But Ace+King is not a pair and if the flop misses you, good luck! Poker needs a new saying, something like this: what do you have when you are dealt an ace and a king...nothing.
Well, here are two hands where I absolutely overplayed ace-king. I think I rather change the word overplayed in the previous sentence to stupidly played (especially on the flop).