I know thats why I'm concerned. If he was younger I wouldn't worry, but at 20 weeks I'm worried this will just be his personality. The breeder says he'll always be gentle and laid back but won't be shy/scared.
The reason I think maybe shes right is that his sister is the same but all her adults were outgoing. I've never had a FB before, so I don't know if this is normal for the age.