Lets see here.. Do I have a problem calling his raise and then 25$ all when he had 425 chips. No, sure its a 1/3 of my stack but I would have gambled it!
I have folded KK after the flop but not before the flop but I believe that wasnt the question in his post. I have called plenty of time where they had AK and I have won. I even cracked Aces with my KK plenty of times hitting trips. KK is usually very good to me which is why I say its my favourite hand.