Hi! I'm pretty new at chickening, but here's what I've experienced.
Roo #1 Blue Cochin - Was around 5 months when we got him. Was friendly. At 8 mos. old started flying up at the kids, then at me!! Tried breaking him of it but decided to re-home him.
Roo #2 Barred Rock - Raised him from a chick. Held him a lot. Was friendly until he reached maturity. Never bothered me, but would attack my then 4 yr. old daughter. He even tried to get her through the wire. He ended
up on my neighbors dinner table. He was about 6 mos. when he started this, got progressively worse.
Roo #3 EE -Was very nice. Never bothered anyone. Treated the hens nicely. I re-homed him because he was an olive egger, so he'd produce offspring who layed olive egss. I'm not crazy about olive eggs.
Found him a good home.
Roo #4 Bantam NN -Nice until he reached maturity. Never goes after me but occasionally will go after the kids. I put him in his place which keeps him in check for a while. Keeping him since he's not terribly aggressive, just
a nuisance from time to time.
I've heard that handling them can make them nicer, but I've also heard that it can make them disrespect you therefore making them turn on you. I think it has to do with their genetic make up. Some breeds are known for not producing nice roos. However, I went out and got a Cochin roo because that was a breed known for being docile. Always exceptions to the rule. Only one way of knowing for sure and that's to wait and see. Hope
your sweet boy works out for you.