I have known/kept 13+ cats (9 females, 3 males, 1 unknown), and I have always known the male cats to be a lot sweeter and friendlier than the females. Even the feral male cats were easier to get along with than the females. I have also noticed that mother cats are sweeter than other females. The mothers are sweeter once their kittens get a little older, when they are not as protective of their kittens.