I raise a lot of males because I hatch out a lot of chicks. I have had some aggressive males in the past but most aren't. I do handle them some but not a lot because I show my birds at poultry shows so I want them to get used to some handling. If they are aggressive I sell them but tell the people who buy them that they may be aggressive. Some people have told me that once the birds were relocated to their new home they stopped being aggressive. I think it might be due to a new environment they are in and they are then at the bottom of the pecking order until it gets reestablished. I have had people who have bought males from me who absolutely love them because they aren't aggressive. I think to some extent it's in the genes. There is really no way to know but from my experience the hatchery males seem to be more aggressive. I think the more you interact and treats will help.