some quick rules.
If you have 100bbs, there are hands you cannot/should not fold unless the board is super dry. So never fold bottom set in a raised pot, never fold KK for 100bbs unless the guy is 9/0 and even then you should pay it off. The fact is that some donk will squeeze you with kings/queens or whatever and you should never fold kings ever.
Renton would argue your equity in the pot is just too big, and to be brutally frank i agree in all but 0.000005 cases.
You have to have a sick sick sick sick read to fold the amount of equity Kk has preflop.
In games smaller than 200nl people are felting QQ/AK hence folding KK with the equity it has there is also wrong.

When the stacks get deep decisiosn become less straight forwrd. I.e it isnt wrong to raise 32o UTG at a full ring game with 450bbs stacks, but it is wrong to stack off 450bbs deep with KK preflop.