Start looking around, try to get a rooster that is close to a year old, by then their temperament is pretty established, and they are mature enough to handle ALL the aspects of being a flock master. Like wise, don't get a rooster until your hens are laying.
If this is your first time with a rooster, do not make a pet of him, make him move out of your way. Don't let him breed in front of you or crow when you are close by. A firm push will be enough.
This will change the dynamics of the flock, the girls will fall in love with the rooster, and pay him all the attention that they currently pay you. He will come over to meet you at the gate, and generally, kind of, sort of, keep himself between you and the flock. I like having a rooster in the flock, but it does change things.
After disposition, age, then go for eye candy. Ask around at the feed store, or the local poultry group, for other people that raise chickens, often times they will have a sweetheart, that should have been culled but was so nice, that so far he has been spared. And THAT is the one your want!
Good luck.
Mrs K