Ok I have 6 cats, 2 males and 4 females. Now they all get along GREAT! As long as u are patient and do the introductions right then I think all will be fine! My Stormie at first hated it when Blue came, now they are inseperatable! They are both female btw! The males tend to be more affectionate but same with the females! No one is more affectionate than my Bella lol, and then Willie is next in line! Also all of their age groups vary from 9 months (stormie) to 11 years (willie) Also Willie doesnt get along that well with the cats in the house, but he does get along great with the neighbors cats and our feral we have lol! But each cat has their own personality! IMHO the gender doesnt really matter, ecs if they are fixed anyways! The thing about females is they tend to be territorial but with 4 females only one is a bully and not territorial at all! My gram now has 2 females and a male and the male and female get along great!!! Now also my brother has 2 males and 1 female and once again they all get along GREAT and the males are great together! SO it all depends on the personality of the cat(s) more so then gender I think ecs if they are fixed and such!

I hope I helped u out, this is all from personal experience too! Also my females all get along great as well! I too was worried about these rumors of genders and whats better and such! But luckily in my case and other peoples cases that i know it wasnt true!