I've had some awesome dogs. Most of them have been rescues (who could deny them a home?!) and I find that rescues are often extremely grateful for their position in life and do everything they can to be on your good side. That said, one of the best dogs I've ever had was not a rescue per say, just a pick up from an unwanted litter.
Aussie was the smartest, kindest, most fun dog. I miss her so much.