I agree with 16 and me (and BTW Sammy is quite handsome). Roosters do best raised by chickens in multi-generational situations and not as pets (I do this with my turkeys as well - it saves a lot of injuries to juvenile/teenage males). If you want a pet, have a pet hen. I think genetics have less to do with aggressiveness (not nothing, but less) than how they are raised.
Early in my chicken raising I tried to handle my roosters a lot when they were young. They grew up to be obnoxious. The ones that turn out nice have been ones that I handled only as needed (spur/nail trimming, moving, etc.) then otherwise let them be roosters.
I currently have 31 hens and 3 roosters. Wally is an older SLW with great body conformation, but one double spur and one long/one short wattles - he has not passed this to any of his offspring. He's good to his girls, easy for me to handle if needed, and has never been threatening toward me or anyone who's gone into my poultry yard. His son, Walter, on the other hand, is not trustworthy - he's ok, just don't turn your back on him. Basically, he's insecure - thinks I'm going to take his hens. He has his own pen with his girls as he would like nothing better than to oust his daddy. Reinhold is a Copper Black Marans cross that has grown up in the multi-generational group. He's gorgeous, he's not aggressive toward anyone, and he lives with Wally and several hens. Wally has his hens and Reinhold has his - they don't fight over hens, food, or people.