I have one chick that will sit on my lap and climb on me. The only thing I can figure out that was different with her is, she was the first to hatch and was alone for an hour until the next chick hatched, so I sat and talked to her and handled her a little bit to keep her company. The rest had her or each other for company so I was irrelevant.
The next batch will defiantly be handled more than this one. They were so tiny and fragile, I also had to keep a close eye on my two dogs when I was handling them. One dog doesn't pay them any attention the other barks and whines when they go in their house since she can't see them, lol. If she can see them she quietly lays by their pen just watching them and their antics.