The real reason why Kong liked Ann in the 1933 movie(canon sources)
Kong liked Ann because her hair remembers him of his parent's eyes(Kongs have yellow eyes). His parents were kiled by the super dinosaur Gaw, and he misses them.
Kong's yellow eyes(Great War 4#)
Souce of the information:King Kong vs Tarzan( not canon of course, but only the Tarzan part, the other basic information of the world is correct)