My first two ducks were Cayuga's. I raised them together since they were 5 days old. They were brothers, and identical in so many ways that I even had to leg band them with colored zip ties in order to tell them apart. Their names were Morgan and Hunter, and they were beautiful. When they were babies, they were like two peas in a pod. They both had the same likes, same dislikes, even the same waddle. Both liked to snuggle and both enjoyed their 'bath' time in the tub in the house. But when they matured, it was like ying and yang. Morgan was gentler, more laid back. He came when I called him and he loved to eat whatever treats I offered him right from my hand. Hunter was louder, more assertive. He knew his name too. I could tell he did by the way he always turned his head ever so slightly away from me whenever I said it. He also stopped eating from my hands. As adults, neither one of them really appreciated being held for more than a minute or two, which was interesting because, as little babies, that's about all they wanted. Even though they were brought up the same way and with the same advantages and potential disadvantages, they turned out to be not so much the same once they matured. Experiencing their differences actually made me love them as individuals all the more. I don't think there's such a thing as a 'peoples duck' or even a particular breed of duck that's known to favor humans over their own species. I think that there are some ducks that are just more partial to humans than to other ducks, no matter what the breed. The trick is in finding one of them. Good luck with your search. I'm sure you'll find exactly what it is that you're looking for. Just don't give up hope!
P.S. I know nothing about Pekins, as I've never had one before...