Mon Ami was a rescue, from a family that had hand raised him. He didn't know how to do the poultry thing, when he first came here. He was even afraid of the other chickens, and the lawn. He watched the other birds, though, and figured out, wow, I can do this. And then he figured out he was a rooster, and seems to have been a happy bird since.
The one thing he doesn't do, is crow early. Most of the roosters I've had, 3 to 4 a.m., they would be starting crowing, jumping down from the roost to stretch, flap wings, and bellow hello to the morning.
Mon Ami takes a rather more casual approach. He will let the day know he's awake, eventually. He does crow, but I have more than once heard him crow, oh, at the crack of 7ish... He will crow at other times of the day, if he's happy, if he's angry, or when he is high up on a perch.
But greeting the day, he's happy to let someone else be an 'early bird'!