they seem impossible to play, if you raise and get called, the caller probably has an ace, so you have to shut down if one comes on the flop. If you slow play them you let a whole range of hands in to suck out on you.  And you can't fold them, who has ever folded pocket kings preflop?  Nobody.  Maybe it's my jaded memory easier to recall the bad beats than the just victories, but I seem to lose money more often than not when I see those big buggers staring back at me