Once upon a time I thought that female dogs were best, so that's what I
chose to have, and they were great.
So were the boydogs that came along later, there was not any difference
between how we interacted (although I had bred them myself, that might make
a difference.)
The only male dog I had to live with and found very challenging was a German
Shepherd.  His name was Rebel (that should tell you something!)
He was an ex-police dog, he'd been dishonourably discharged from the Force
after he ripped out the thigh muscle of a criminal that he arrested properly
(grabbing the arm) who then proceeding to kick him in the stomach.  He lost
his temper..
Somehow he became available for the security services.  My DH was working in
that field at the time and was offered him.
So we brought him home.  I'm glad we did.
We had no idea what must have happened to him previously but he was racist.
He went crazy in the car if he noticed that a black person was driving the
car behind.  He also had no respect for women.  DH had to be sure to wear
his uniform at first - which Rebel seemed to respect - otherwise he would
have got bitten.

This is a happy story, though.  I managed to teach him respect for women
(not easy with a large dog that could easily kill you.)  He found out that
people out of uniform were ok.  He never got over his racism.
He lived with us until he was 14, he went off his legs as GSD's often do and
we had to say goodbye.
I think of him often.  I used to take him for a walk late at night - if he
saw someone approaching he would put his whole body in front of me.  They
usually crossed to the other side of the road!
If they had attempted to attack me I think he might have tried to kill them.

He was surly and difficult, I once bopped him lightly over the head with a
frying pan.  I was going to work.  He didn't want me to go.  He was on his
bed so I patted his head and said "I'll be back soon."
He growled at me, and then he snarled with his teeth showing.  He was cross
because I was leaving him, of course, but this is not acceptable behaviour.
I slapped him around his ear, fairly gently.  He snarled again and got up
for a challenge.
Frying pan did the trick.

I miss him.   I could have walked through any dangerous part of the city at
any time of day or night with him beside me and no-one would have dreamed of
approaching me - he would have done them a lot of damage if they dared.