Are you getting hatch mates or do you currently have hens and adding to them?
If you are just getting started, I would recommend no roosters until next year. Cockerels tend to grow faster than pullets, become sexually interested long before pullets and can just be very rough on pullets.
However, if you wait a year, and let the rooster grow up under adult hens, those hens will teach him some manners, and proper behavior in chicken society. The best roosters that I have had, have been raised up under adult hens.
However, nothing is fool proof, and really do not get a rooster if you do not think you can cull it, or have friends or family that can cull it. A LOT of roosters just do not work out. They can be aggressive with other birds, or become human aggressive. Most people vastly underestimate how violent a rooster can be.
If you have children under the age of 6 I highly recommend NOT HAVING a cockerel. Cockerels tend to attack children first if they are becoming human aggressive. Often times people say that the attack came out of no where, but I think that inexperienced people do not recognize or find excuses for the signs of aggression until it is too late. Children can take that attack in the face. Roosters have ruined the whole chicken hobby for a lot of people.
As for friendly - no you really don't want that. Cockerels and chickens really are not like puppies and kittens, whereas if you are nice to them, they become life long companions. Any two birds meeting up, one is higher and one is lower socially speaking. The lower bird gives ways, that is giving respect. If not, there is a peck or more to remind them. If your cockerel is not respectful to you, keeping about 5-8 feet away from you, moving out of your space. That is respect. Otherwise, he is not afraid of you, comes into your space, and really thinks you should back down, and eventually becomes willing to flog you to do so. This website is filled with posts where the darling became the nightmare in an instant.
If you get a fantastic rooster, you have been blessed, and they are a joy to have in the flock and to watch as he takes care of your girls. Just know, no matter how you raise him, this is a crap shoot. They can turn on you any time. You need to be very aware.
Mrs K