How old is this young roo, anyway? If he's not even five or six months old yet, you may still have a few uncertain months ahead where he could go either way. As a rule, when the hormones kick in, usually around six or seven months, you will see some testing of limits.
My current roo Izzy, a well-behaved nine-month old Buff Brahma, got it in his little mind around age six months to attack my feet and hands with his beak, apparently believing I suddenly had turned into a threat. Up until that time, he was cuddly, easy going, and never showed a bit of aggression. At the first peck on the feet, I pushed him to the ground and held him there until he became calm and still. We had to repeat the process a few more times in a week, and he's been well-behaved ever since. Discipline is extremely important the minute a roo shows signs of aggression.
Even though he seems back to his cuddly self, I resist trying to show him any affection because many roosters confuse these human overtures with aggression, and it sends mixed signals. While roosters are pretty smart, they can't be expected to nuance displays of human emotion. You need to keep your behavior as simple and as consistent as you can. That goes for all the humans in your household that have exposure to the chickens.
Hens are another matter entirely. Spoil them, hug them, hold them, kiss them. It won't matter. Most soak it up and demand more. But with a rooster, you need to treat him with respect and distance. They can get the wrong idea very easily, and then you have the problem of trying to undo the damage.
