I have had both hatchery RIRs, breeder quality RIRs and hatchery NHs. The NH girls I had were fabulous layers of huge eggs. They would never be suitable for a meat bird by any stretch, though, as they were fairly lean-bodied. None of mine were aggressive.
The only ones that are agressive are the ones from feed stores, (Their not pure).But,most generally the ones from a hatchery are pure and are the more docile ones,and not near as agressive.