 In contrast to the Scottish birth of Scrooge, Rockerduck claims to be hailing from England like his father Howard, where he is sometimes depicted to be living, and shown to be the more active in Europe than in America, with some stories having Scrooge having to buy land from him or compete with him to be able to expand his businesses on the European markets.This is often ignored in other stories to be able to have the rivals meet on a daily basis as in the case of Scrooge's other rival, Flintheart Glomgold (who in the Barks stories lives in South Africa) with John primarily managing his activities from a large business building he owns in Duckburg, and the three characters sitting at the same table in the Billionaires' Club of the city.Rockerduck also has a passion for collecting.