I agree with NeoStar on carefully choosing what type of dog to get.
back to topic...My Dad has had both Dingo's and BlueHealers on the ranch and they both where great companions for my father. They helped on the ranch with the cattle and were very protective of my father's stuff. I would bet you I could put a hundred dollor bill on the tailgate of the pickup and go in the store and come back an hour later and that 100 bucks would still be on the tailgate!

But I have pictures of my kids just mauling "SOB" (hehe I still chuckle at S.O.B's name

) and "Freckles" and they would just let them do it...never growling or nipping at them.
In short, They love to "range" and "work" and love personal attention (but then I think all dogs need and want attention). Very loyal but can be agressive towards "new unknowns".