Contrary to some opinions, how he develops as he matures will primarily be down to how you treat him on the way.Newbie to chicken-raising! I have 14 chicks of various breeds that range from near 4 to 6 weeks, and so far, I have only identified one cockerel, Rudy. He is a RIR who is the largest and appears to be the oldest chick of the bunch. He seems to be already exhibiting quite a few roo-ish behaviors that I am trying to understand. He will peck the other chicks if I am holding them! He will pace around me, giving me the one eyeball stare, peeping incessantly, and he will sneak in and attempt to peck them on the feet or even on the body if he can't get to their feet. I am wondering if he is "jealous" of me or if he is already expressing possession of the other chicks?? He is docile otherwise and will allow me to hold him, so I am just curious if this is normal behavior or if it is a sign he will be "mean" later, since he hasn't even gone through chicken "puberty" yet lol.
People can and do raise non human aggressive cockerels to roosters by just keeping them at a distance. I want a bit more then that from a rooster.
You can go the intimidation route and strut around believing you're the boss. If you're lucky the rooster may become frightened of you enough not to give you any problems. People do this as well. Not a route I'm interested in.
I've 7 roosters free ranging here each with their own group of hens. The free ranging part makes an enormous difference.
I wrote a fairly long article about rooster behavior that may help you. I don't know how well or badly it translates for contained roosters. However, the behavioral signs will be pretty much the same. While it's true all roosters are individuals, much like any other species there are behavioral traits that are common and knowing what these are can help one avoid problems before they arise.
Have a read and see what you can use from my experiences. I've had some shockers but they came good with a bit of thought and effort.
https://www.backyardchickens.com/articles/understanding-your-rooster.75056/