eeek, I bet!!! I've never kept a swan, but if I had land with a pond I would love to. I hear tell that their personalities can sometimes be like geese squared, though.

Being hissed at by a captive Canadian goose at a fair a few years ago was at once among the loveliest and most intimidating waterfowl encounters I've ever had. They are incredibly beautiful, and the closer you get it seems like the prettier they are...but damn, don't fuck with them.