My first snake was a corn he's always been a sweety never bites did go off feed once for 4 months though which was a bit fusterating. I know i;m repeating what alot of people have said but corns truely are a re great first snake. Especailly if you have kids just because a ball python is much more easly stressed and since there nocturnal your kids will most likely never see him/ her out cruising around as a corn would. I"ve never worked with a king so I can;t comment on them but if you want a snake that is usually very docile,sweet won;t bite and has a high tolerance of handleing a corn is the way to go. Corns also come in tons of cool colors and are relativly cheap to maintain and don;t get to big.
Just my thoughts
Kayla
btw good luck with whatever you get and post pics