I am biased towards male dogs. Always connected better with them for some reason. Found them less bitchy, snarky, etc. More so "I love you and will do anything for you" vs. "what's in it for me?" kind of thing, LOL. I've found them easier to train and more biddable.
I grew up with females and am pretty certain I'll always have males from here on out. I've been dogsitting for a while now and surprisingly, they've also all been males and I've just become a "male dog person" LOL.
None of them mark, except one. All squat lol, ranging from a Rottie to a Lab to a Boston Terrier mix and all in between. Jackson has never ever lifted his leg inside and still squats to pee except if we're on a walk.
But both can be equally great pets of course. I think it mainly depends on the dog, really. But yeah, I have a thing for males, I guess
My dad has also turned into a male dog person... he always had females - always. Now we adopted our first male over there about 2 years ago and he says he will always have males too.