I like to play KJ on the BTN or CO or HJ -- basically in position.
If no one has led out, or 3bet an open from earlier position (like UTG , +1, +2 ) before I am to act then I know I probably have the best Kx hand.
I doubt people would not raise, or re-raise KQ or AK before me.
If there is an open before me I tend to just call with this hand, I rarely repop it unless a maniac is opening 50% of hands.
But I play microstakes so that's why I dont 3bet in position with this hand because in micros you will only face better hands most of the time...everyone is a mega nit. And many will open very small hoping someone with KJ goes crazy in position.
Gl at the tables !