They can be just fine with people. Roosters should be in general not aggressive towards people.
Not to worry you, exceptionally tame roosters in general can have higher incidence of being aggressive towards people.
In general again, roosters that are aggressive towards people are called man fighters in the game hobby and most are culled because it is not desirable. If yours was from this type of breeding, perhaps he will never be aggressive towards you. But same time they can be a little excitable so don't let anybody tease him no matter how funny it may seem at the time. like prodding at him with a boot, toy or ??? to get him to raise his hackles.
If you get hens, game roosters have a strong instinct to protect their hens.. so if you grab a hen and it sqwauks... he may charge and attack to defend his hen.
I hope this is not too scary, think of it being informed and try to go with the flow, perhaps he will be a cool guy after all.