I got a surprise mix last winter, and was kind of bummed to have pekins in there, thinking "oh well they are just white". Well they do grow up to be the cutest things, so fluffy, and yes the feathers are white, but they have a creamy look to them. Plus, they make a good meat bird if so someone wants that. Very calm and friendly. My mallards though always seemed the most interactive with me, but that might just be because I only raise a small number at a time. I did have someone ask me early this year if I had any mallard hens, as they didn't want to raise any and wanted some. A lot of people around these parts seem to want mallards because they fly and they like them on ponds, or for sport reasons. I like the suggestions of dual purpose birds as well.