I really cannot believe more people are agreeing that KJ is a hand that wouldn't be played (assuming it is not suited). I agree with a lot of other replies that it depends on position, if it's suited or not, etc. But note that KJs is part of the top 7% of all possible starting hands, while KJo is part of the top 12% of potential starting hands. While it isn't a hand to shove with or anything to inflate pots, it's not a hand to insta-fold regardless of your past experiences.