All of my current roosters are nice right now. But I have had a few in the past that were not. The first that comes to mind is my 'kick me' banty rooster. He would run after be and attack me again, and again, and again. Each time I would kick him away and he would just keep coming. I eventually had to sell him because I didn't want him to attack one of my fruitstand customers.
I also remember an evil rooster as a child that would attack people. But the rule was that anything that attacked my Mom died. So he became chicken dinner.
The dominant roo I have right now is eviiillllll. I think he may be possessed. My guineas used to beat him up, and I think that made him mean. He hates everybody!!
I have a roo, mix of something, that is very aggressive to my 4 year old son. I've kicked him away many times. I have a feeling he'll be on the chopping block soon.
Over the last 7 years I have had several standard Roosters that went mean as they grew up. Most just didn't like me picking up their ladies. Once a rooster goes mean he gets cooked(litalary).
Yes, I became affrad of entering the coop to get eggs. If I even came close he would run at the fence and bounce off untill you left. We got rid of him.