My good old race bird, The Diver, fostered the first round off the grizzle Thone' after they abandoned them. They were on the floor and I think they were annoyed by the other yearlings. The Diver is a very intelligent pigeon and very quiet. The grizzly youngsters are very quiet too, in fact the cock youngster is unusually tame.
In contrast, the grizzle cock and his mate raised the second round, and they are fiery! Like their father. He's not wild, if I put my hand in his nest box, he sits on my shoulder growling in my ear.

Some strains have a reputation for being quiet, some for being wild. I think the first few weeks of their lives is where they develop their personalities. Like everything, they learn by watching.